Hi all,

I'm getting down to the wire with this MPI Installation and have gotten to
the following part:

"To supply a switched 12 volt power supply to the two bulkhead mounted
relays, locate the old positive (+) side coil wire (usually a yellow color).
Connect this wire to the relay wire. Now connect the red relay wire to the
starter relay, battery plus(+). The starter relay is usually located under
the battery box or mounted on the fender panel. Mount the system fuse.NOTE:
Make sure that the switched 12 volt wire is not routed through a ballast
resistor or resistance wire. Also make sure that 12 volts are present on
this wire during cranking!"

Well, I can find the red relay feed to the starter relay, battery plus (+)
but from what I can see the positive (+) side coil wire was on the old
Wiring Harness which has been removed.

Am I right here? If not where am I wrong and if I am right where do I get
the source for this part?

Thanks in advance,

Bill

 

The wiring harness umm, kinda needs a coil positive wire. What happened
to yours?

On the 4.2 engine, the coil power is a ballast wire. This fat soft 5'
long red or orange wire terminated near the coil and a wire is crimped
on that goes to the starter relay with a second yellow wire coming from
the same crimp going to the coil itself.

The starting end of this ballast wire is up near the brake master
cylinder inside the harness and is a crimp connection onto the ignition
module's main power which is a 10 ga. red wire with a white stripe. At
this same crimp connection, a solid core thin brown wire is attached
that runs to the alternator plug for the 'excite' power. This
connection will have what looks like gray duct tape on it likely.

Sounds like you need to trace the alternator's excite wire to where it
hooks to the ignition power and run your switched 12 volts from there.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> Hi all,
>
> I'm getting down to the wire with this MPI Installation and have gotten to
> the following part:
>
> "To supply a switched 12 volt power supply to the two bulkhead mounted
> relays, locate the old positive (+) side coil wire (usually a yellow color).
> Connect this wire to the relay wire. Now connect the red relay wire to the
> starter relay, battery plus(+). The starter relay is usually located under
> the battery box or mounted on the fender panel. Mount the system fuse.NOTE:
> Make sure that the switched 12 volt wire is not routed through a ballast
> resistor or resistance wire. Also make sure that 12 volts are present on
> this wire during cranking!"
>
> Well, I can find the red relay feed to the starter relay, battery plus (+)
> but from what I can see the positive (+) side coil wire was on the old
> Wiring Harness which has been removed.
>
> Am I right here? If not where am I wrong and if I am right where do I get
> the source for this part?
>
> Thanks in advance,
>
> Bill

 

The wiring harness umm, kinda needs a coil positive wire. What happened
to yours?

On the 4.2 engine, the coil power is a ballast wire. This fat soft 5'
long red or orange wire terminated near the coil and a wire is crimped
on that goes to the starter relay with a second yellow wire coming from
the same crimp going to the coil itself.

The starting end of this ballast wire is up near the brake master
cylinder inside the harness and is a crimp connection onto the ignition
module's main power which is a 10 ga. red wire with a white stripe. At
this same crimp connection, a solid core thin brown wire is attached
that runs to the alternator plug for the 'excite' power. This
connection will have what looks like gray duct tape on it likely.

Sounds like you need to trace the alternator's excite wire to where it
hooks to the ignition power and run your switched 12 volts from there.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> Hi all,
>
> I'm getting down to the wire with this MPI Installation and have gotten to
> the following part:
>
> "To supply a switched 12 volt power supply to the two bulkhead mounted
> relays, locate the old positive (+) side coil wire (usually a yellow color).
> Connect this wire to the relay wire. Now connect the red relay wire to the
> starter relay, battery plus(+). The starter relay is usually located under
> the battery box or mounted on the fender panel. Mount the system fuse.NOTE:
> Make sure that the switched 12 volt wire is not routed through a ballast
> resistor or resistance wire. Also make sure that 12 volts are present on
> this wire during cranking!"
>
> Well, I can find the red relay feed to the starter relay, battery plus (+)
> but from what I can see the positive (+) side coil wire was on the old
> Wiring Harness which has been removed.
>
> Am I right here? If not where am I wrong and if I am right where do I get
> the source for this part?
>
> Thanks in advance,
>
> Bill

 

Thanks Mike,

I have located a red wire with a white stripe that is spliced into the
wiring harness which the continuation is going to the positive pole of the
ignition switch.

That is like this:

Source Wire in harness >
Splice >
Two red wires with white stripes coming out of splice from source >
#1 is hanging out of the harness and was previously going to the old
ignition coil.
#2 is going to a relay and then the positive pole (not the battery pole
itself on the switch but the
one on top of the switch on the side of the battery pole) of the ignition
switch.

This looks like your first paragraph discription.

Regarding the second part of your statement.

Are you saying that there should be an "Excite Wire" running from the
Alternator to the ignition switch module and this is what I need to hook
into the wiring harness (Mopar)?


Thanks in advance,

bill



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F6872C3.FA1F224@sympatico.ca...
> The wiring harness umm, kinda needs a coil positive wire. What happened
> to yours?
>
> On the 4.2 engine, the coil power is a ballast wire. This fat soft 5'
> long red or orange wire terminated near the coil and a wire is crimped
> on that goes to the starter relay with a second yellow wire coming from
> the same crimp going to the coil itself.
>
> The starting end of this ballast wire is up near the brake master
> cylinder inside the harness and is a crimp connection onto the ignition
> module's main power which is a 10 ga. red wire with a white stripe. At
> this same crimp connection, a solid core thin brown wire is attached
> that runs to the alternator plug for the 'excite' power. This
> connection will have what looks like gray duct tape on it likely.
>
> Sounds like you need to trace the alternator's excite wire to where it
> hooks to the ignition power and run your switched 12 volts from there.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > Hi all,
> >
> > I'm getting down to the wire with this MPI Installation and have gotten
to
> > the following part:
> >
> > "To supply a switched 12 volt power supply to the two bulkhead mounted
> > relays, locate the old positive (+) side coil wire (usually a yellow
color).
> > Connect this wire to the relay wire. Now connect the red relay wire to
the
> > starter relay, battery plus(+). The starter relay is usually located
under
> > the battery box or mounted on the fender panel. Mount the system
fuse.NOTE:
> > Make sure that the switched 12 volt wire is not routed through a ballast
> > resistor or resistance wire. Also make sure that 12 volts are present on
> > this wire during cranking!"
> >
> > Well, I can find the red relay feed to the starter relay, battery plus
(+)
> > but from what I can see the positive (+) side coil wire was on the old
> > Wiring Harness which has been removed.
> >
> > Am I right here? If not where am I wrong and if I am right where do I
get
> > the source for this part?
> >
> > Thanks in advance,
> >
> > Bill

 

Thanks Mike,

I have located a red wire with a white stripe that is spliced into the
wiring harness which the continuation is going to the positive pole of the
ignition switch.

That is like this:

Source Wire in harness >
Splice >
Two red wires with white stripes coming out of splice from source >
#1 is hanging out of the harness and was previously going to the old
ignition coil.
#2 is going to a relay and then the positive pole (not the battery pole
itself on the switch but the
one on top of the switch on the side of the battery pole) of the ignition
switch.

This looks like your first paragraph discription.

Regarding the second part of your statement.

Are you saying that there should be an "Excite Wire" running from the
Alternator to the ignition switch module and this is what I need to hook
into the wiring harness (Mopar)?


Thanks in advance,

bill



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F6872C3.FA1F224@sympatico.ca...
> The wiring harness umm, kinda needs a coil positive wire. What happened
> to yours?
>
> On the 4.2 engine, the coil power is a ballast wire. This fat soft 5'
> long red or orange wire terminated near the coil and a wire is crimped
> on that goes to the starter relay with a second yellow wire coming from
> the same crimp going to the coil itself.
>
> The starting end of this ballast wire is up near the brake master
> cylinder inside the harness and is a crimp connection onto the ignition
> module's main power which is a 10 ga. red wire with a white stripe. At
> this same crimp connection, a solid core thin brown wire is attached
> that runs to the alternator plug for the 'excite' power. This
> connection will have what looks like gray duct tape on it likely.
>
> Sounds like you need to trace the alternator's excite wire to where it
> hooks to the ignition power and run your switched 12 volts from there.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > Hi all,
> >
> > I'm getting down to the wire with this MPI Installation and have gotten
to
> > the following part:
> >
> > "To supply a switched 12 volt power supply to the two bulkhead mounted
> > relays, locate the old positive (+) side coil wire (usually a yellow
color).
> > Connect this wire to the relay wire. Now connect the red relay wire to
the
> > starter relay, battery plus(+). The starter relay is usually located
under
> > the battery box or mounted on the fender panel. Mount the system
fuse.NOTE:
> > Make sure that the switched 12 volt wire is not routed through a ballast
> > resistor or resistance wire. Also make sure that 12 volts are present on
> > this wire during cranking!"
> >
> > Well, I can find the red relay feed to the starter relay, battery plus
(+)
> > but from what I can see the positive (+) side coil wire was on the old
> > Wiring Harness which has been removed.
> >
> > Am I right here? If not where am I wrong and if I am right where do I
get
> > the source for this part?
> >
> > Thanks in advance,
> >
> > Bill

 

Hi Bill,
Following their directions, you'll need to hook it up before the
coil resistor ballast that should be located on your firewall, made of
white porcelain and looks like:
http://www.go2marine.com/go2_structu...7/83474F-p.jpg Unless yours
is the resistor wire in the harness that you threw away. Which means
you'll have to purchase a new resistor to operate your coil. More than
likely your ignition switch will not power the coil in the start
position, so you'll have to also connect that wire to the starter
solenoid bypass connection. Which I can see problems with, without
another relay.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

William Oliveri wrote:
>
> Hi all,
>
> I'm getting down to the wire with this MPI Installation and have gotten to
> the following part:
>
> "To supply a switched 12 volt power supply to the two bulkhead mounted
> relays, locate the old positive (+) side coil wire (usually a yellow color).
> Connect this wire to the relay wire. Now connect the red relay wire to the
> starter relay, battery plus(+). The starter relay is usually located under
> the battery box or mounted on the fender panel. Mount the system fuse.NOTE:
> Make sure that the switched 12 volt wire is not routed through a ballast
> resistor or resistance wire. Also make sure that 12 volts are present on
> this wire during cranking!"
>
> Well, I can find the red relay feed to the starter relay, battery plus (+)
> but from what I can see the positive (+) side coil wire was on the old
> Wiring Harness which has been removed.
>
> Am I right here? If not where am I wrong and if I am right where do I get
> the source for this part?
>
> Thanks in advance,
>
> Bill

 

Hi Bill,
Following their directions, you'll need to hook it up before the
coil resistor ballast that should be located on your firewall, made of
white porcelain and looks like:
http://www.go2marine.com/go2_structu...7/83474F-p.jpg Unless yours
is the resistor wire in the harness that you threw away. Which means
you'll have to purchase a new resistor to operate your coil. More than
likely your ignition switch will not power the coil in the start
position, so you'll have to also connect that wire to the starter
solenoid bypass connection. Which I can see problems with, without
another relay.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

William Oliveri wrote:
>
> Hi all,
>
> I'm getting down to the wire with this MPI Installation and have gotten to
> the following part:
>
> "To supply a switched 12 volt power supply to the two bulkhead mounted
> relays, locate the old positive (+) side coil wire (usually a yellow color).
> Connect this wire to the relay wire. Now connect the red relay wire to the
> starter relay, battery plus(+). The starter relay is usually located under
> the battery box or mounted on the fender panel. Mount the system fuse.NOTE:
> Make sure that the switched 12 volt wire is not routed through a ballast
> resistor or resistance wire. Also make sure that 12 volts are present on
> this wire during cranking!"
>
> Well, I can find the red relay feed to the starter relay, battery plus (+)
> but from what I can see the positive (+) side coil wire was on the old
> Wiring Harness which has been removed.
>
> Am I right here? If not where am I wrong and if I am right where do I get
> the source for this part?
>
> Thanks in advance,
>
> Bill

 

The red/white stripe wire from the ignition should be a hot when key is
in 'run' wire, right?

I have the AC Delco alternator that uses an excite wire from this
source. With some aftermarket ignitions, this excite wire has to have a
diode added in line or the alternator will keep the engine running when
the key shuts off.

I don't know the wiring on the Mopar alternator, sorry.... I don't know
if it needs an 'excite' power wire to turn it on or if it is a 'self
excite' type.

Mike

William Oliveri wrote:
>
> Thanks Mike,
>
> I have located a red wire with a white stripe that is spliced into the
> wiring harness which the continuation is going to the positive pole of the
> ignition switch.
>
> That is like this:
>
> Source Wire in harness >
> Splice >
> Two red wires with white stripes coming out of splice from source >
> #1 is hanging out of the harness and was previously going to the old
> ignition coil.
> #2 is going to a relay and then the positive pole (not the battery pole
> itself on the switch but the
> one on top of the switch on the side of the battery pole) of the ignition
> switch.
>
> This looks like your first paragraph discription.
>
> Regarding the second part of your statement.
>
> Are you saying that there should be an "Excite Wire" running from the
> Alternator to the ignition switch module and this is what I need to hook
> into the wiring harness (Mopar)?
>
> Thanks in advance,
>
> bill
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:3F6872C3.FA1F224@sympatico.ca...
> > The wiring harness umm, kinda needs a coil positive wire. What happened
> > to yours?
> >
> > On the 4.2 engine, the coil power is a ballast wire. This fat soft 5'
> > long red or orange wire terminated near the coil and a wire is crimped
> > on that goes to the starter relay with a second yellow wire coming from
> > the same crimp going to the coil itself.
> >
> > The starting end of this ballast wire is up near the brake master
> > cylinder inside the harness and is a crimp connection onto the ignition
> > module's main power which is a 10 ga. red wire with a white stripe. At
> > this same crimp connection, a solid core thin brown wire is attached
> > that runs to the alternator plug for the 'excite' power. This
> > connection will have what looks like gray duct tape on it likely.
> >
> > Sounds like you need to trace the alternator's excite wire to where it
> > hooks to the ignition power and run your switched 12 volts from there.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > William Oliveri wrote:
> > >
> > > Hi all,
> > >
> > > I'm getting down to the wire with this MPI Installation and have gotten
> to
> > > the following part:
> > >
> > > "To supply a switched 12 volt power supply to the two bulkhead mounted
> > > relays, locate the old positive (+) side coil wire (usually a yellow
> color).
> > > Connect this wire to the relay wire. Now connect the red relay wire to
> the
> > > starter relay, battery plus(+). The starter relay is usually located
> under
> > > the battery box or mounted on the fender panel. Mount the system
> fuse.NOTE:
> > > Make sure that the switched 12 volt wire is not routed through a ballast
> > > resistor or resistance wire. Also make sure that 12 volts are present on
> > > this wire during cranking!"
> > >
> > > Well, I can find the red relay feed to the starter relay, battery plus
> (+)
> > > but from what I can see the positive (+) side coil wire was on the old
> > > Wiring Harness which has been removed.
> > >
> > > Am I right here? If not where am I wrong and if I am right where do I
> get
> > > the source for this part?
> > >
> > > Thanks in advance,
> > >
> > > Bill

 

The red/white stripe wire from the ignition should be a hot when key is
in 'run' wire, right?

I have the AC Delco alternator that uses an excite wire from this
source. With some aftermarket ignitions, this excite wire has to have a
diode added in line or the alternator will keep the engine running when
the key shuts off.

I don't know the wiring on the Mopar alternator, sorry.... I don't know
if it needs an 'excite' power wire to turn it on or if it is a 'self
excite' type.

Mike

William Oliveri wrote:
>
> Thanks Mike,
>
> I have located a red wire with a white stripe that is spliced into the
> wiring harness which the continuation is going to the positive pole of the
> ignition switch.
>
> That is like this:
>
> Source Wire in harness >
> Splice >
> Two red wires with white stripes coming out of splice from source >
> #1 is hanging out of the harness and was previously going to the old
> ignition coil.
> #2 is going to a relay and then the positive pole (not the battery pole
> itself on the switch but the
> one on top of the switch on the side of the battery pole) of the ignition
> switch.
>
> This looks like your first paragraph discription.
>
> Regarding the second part of your statement.
>
> Are you saying that there should be an "Excite Wire" running from the
> Alternator to the ignition switch module and this is what I need to hook
> into the wiring harness (Mopar)?
>
> Thanks in advance,
>
> bill
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:3F6872C3.FA1F224@sympatico.ca...
> > The wiring harness umm, kinda needs a coil positive wire. What happened
> > to yours?
> >
> > On the 4.2 engine, the coil power is a ballast wire. This fat soft 5'
> > long red or orange wire terminated near the coil and a wire is crimped
> > on that goes to the starter relay with a second yellow wire coming from
> > the same crimp going to the coil itself.
> >
> > The starting end of this ballast wire is up near the brake master
> > cylinder inside the harness and is a crimp connection onto the ignition
> > module's main power which is a 10 ga. red wire with a white stripe. At
> > this same crimp connection, a solid core thin brown wire is attached
> > that runs to the alternator plug for the 'excite' power. This
> > connection will have what looks like gray duct tape on it likely.
> >
> > Sounds like you need to trace the alternator's excite wire to where it
> > hooks to the ignition power and run your switched 12 volts from there.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > William Oliveri wrote:
> > >
> > > Hi all,
> > >
> > > I'm getting down to the wire with this MPI Installation and have gotten
> to
> > > the following part:
> > >
> > > "To supply a switched 12 volt power supply to the two bulkhead mounted
> > > relays, locate the old positive (+) side coil wire (usually a yellow
> color).
> > > Connect this wire to the relay wire. Now connect the red relay wire to
> the
> > > starter relay, battery plus(+). The starter relay is usually located
> under
> > > the battery box or mounted on the fender panel. Mount the system
> fuse.NOTE:
> > > Make sure that the switched 12 volt wire is not routed through a ballast
> > > resistor or resistance wire. Also make sure that 12 volts are present on
> > > this wire during cranking!"
> > >
> > > Well, I can find the red relay feed to the starter relay, battery plus
> (+)
> > > but from what I can see the positive (+) side coil wire was on the old
> > > Wiring Harness which has been removed.
> > >
> > > Am I right here? If not where am I wrong and if I am right where do I
> get
> > > the source for this part?
> > >
> > > Thanks in advance,
> > >
> > > Bill

 

I just talked to Hesco who told me the one wire can be a steady 12 volt
source which can come from the battery and the other wire needs to be a 12
switched source where the switched source is 12 volts in the Start and Run
position when turning the key.

Any comments on this?

Thanks,

bill



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F688D58.D6A43DC7@sympatico.ca...
> I missed that part.
>
> He will need a starter solenoid tag on the switched 12 volts too
> according to his description below.
>
> This can come from the same blue wire he needs to tag (wire from key
> switch to fire up the starter solenoid when in start) for the coil power
> when the starter is turning. Or he could just tag the white or light
> blue wire on the small 2 wire plug for the ignition module for this. It
> already gets 12 volts when the key is in 'start', then the power
> switches to the red wire in this same plug when the key goes to run.
>
> Mike
>
> "L.W.(ßill) ------ III" wrote:
> >
> > Hi Bill,
> > Following their directions, you'll need to hook it up before the
> > coil resistor ballast that should be located on your firewall, made of
> > white porcelain and looks like:
> > http://www.go2marine.com/go2_structu...7/83474F-p.jpg Unless yours
> > is the resistor wire in the harness that you threw away. Which means
> > you'll have to purchase a new resistor to operate your coil. More than
> > likely your ignition switch will not power the coil in the start
> > position, so you'll have to also connect that wire to the starter
> > solenoid bypass connection. Which I can see problems with, without
> > another relay.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > Hi all,
> > >
> > > I'm getting down to the wire with this MPI Installation and have
gotten to
> > > the following part:
> > >
> > > "To supply a switched 12 volt power supply to the two bulkhead mounted
> > > relays, locate the old positive (+) side coil wire (usually a yellow
color).
> > > Connect this wire to the relay wire. Now connect the red relay wire to
the
> > > starter relay, battery plus(+). The starter relay is usually located
under
> > > the battery box or mounted on the fender panel. Mount the system
fuse.NOTE:
> > > Make sure that the switched 12 volt wire is not routed through a
ballast
> > > resistor or resistance wire. Also make sure that 12 volts are present
on
> > > this wire during cranking!"
> > >
> > > Well, I can find the red relay feed to the starter relay, battery plus
(+)
> > > but from what I can see the positive (+) side coil wire was on the old
> > > Wiring Harness which has been removed.
> > >
> > > Am I right here? If not where am I wrong and if I am right where do I
get
> > > the source for this part?
> > >
> > > Thanks in advance,
> > >
> > > Bill