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Ignition relay wiring
#1
Hey,

I'm about to bypass the resistor wire for the electronic distributor.
I bought a Pertronix power relay kit and I'm trying the follow the instructions (https://static.speedwaymotors.com/pdf/4472001.pdf) but when I'm about to wire the isolation diode It says to split the wire from the ignition to the regulator terminal 'I'. It would be simple if I'd have wire at the terminal 'I' but I have nothing.
I have a disconnected black wire at the engine bay but I cannot figure out from where. (I don't know if this wire has any purpose because the car starts and drive excellent with a jumper from the battery to the coil...) What color the wire supposed to be from the ignition to term. 'I'?

I attached the photos of the voltage regulator and the wire what is not connected.

[Image: IMG-20190611-125544.jpg]


[Image: IMG-20190611-125604.jpg]
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#2
I think there is a wiring diagram on the forum check above and see.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
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#3
Hook the Purple wire to the Red/Lt green stripe wire on the "I" terminal of the starter solenoid, that's the 12V boost line to the coil for starting. It has voltage any time the key is in start or run. You can simply put another nut on the stud of the solenoid, capture the purple wire eye loop and put the original wire back in place.

Large red goes to the Batt (+) stud on the front of the starter solenoid.


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#4
(06-11-2019, 12:32 PM)Carolina_Mountain_Mustangs Wrote: I think there is a wiring diagram on the forum check above and see.

I already checked but the black should be a wire for the wiper motor. Probably the previous owner made some modifications and installed that wire. It also has a Duraspark ignition box with a regular distributor what I eliminated when I installed the ready to run dist.
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#5
(06-11-2019, 12:34 PM)Hemikiller Wrote: Hook the Purple wire to the Red/Lt green stripe wire on the "I" terminal of the starter solenoid, that's the 12V boost line to the coil for starting. It has voltage any time the key is in start or run. You can simply put another nut on the stud of the solenoid, capture the purple wire eye loop and put the original wire back in place.

Large red goes to the Batt (+) stud on the front of the starter solenoid.

So just hook the Pertronix purple wire to the terminal "I". And what about the diode?
The manual says "The isolation diode prevents current from the regulator flowing back to the ignition power relay when the key is turned of"
The MSD relay for the same purpose not mentions any diode.
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#6
Your car must be equipped with factory gauges and as such you don't have the alternator warning light and a wire connecting to the "I" terminal on the voltage regulator.

This leads to my question, do you have the factory tachometer? If so, it will no longer function, unless you run the coil from the bypass resistor wire and the Pertronix from the relay, or have Rocketman convert your factory 2 wire tach to a 3 wire tach. You can read more here
https://www.7173mustangs.com/thread-pert...ctory-tach?



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#7
(06-11-2019, 12:53 PM)n_reckless Wrote:
(06-11-2019, 12:34 PM)Hemikiller Wrote: Hook the Purple wire to the Red/Lt green stripe wire on the "I" terminal of the starter solenoid, that's the 12V boost line to the coil for starting. It has voltage any time the key is in start or run. You can simply put another nut on the stud of the solenoid, capture the purple wire eye loop and put the original wire back in place.

Large red goes to the Batt (+) stud on the front of the starter solenoid.

So just hook the Pertronix purple wire to the terminal "I". And what about the diode?
The manual says "The isolation diode prevents current from the regulator flowing back to the ignition power relay when the key is turned of"
The MSD relay for the same purpose not mentions any diode.



If you follow my method, you're hooking it to the starter solenoid, not the voltage regulator. I have my MSD 6AL wired like this and it works perfectly.


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#8
(06-11-2019, 01:33 PM)Hemikiller Wrote:
(06-11-2019, 12:53 PM)n_reckless Wrote:
(06-11-2019, 12:34 PM)Hemikiller Wrote: Hook the Purple wire to the Red/Lt green stripe wire on the "I" terminal of the starter solenoid, that's the 12V boost line to the coil for starting. It has voltage any time the key is in start or run. You can simply put another nut on the stud of the solenoid, capture the purple wire eye loop and put the original wire back in place.

Large red goes to the Batt (+) stud on the front of the starter solenoid.

So just hook the Pertronix purple wire to the terminal "I". And what about the diode?
The manual says "The isolation diode prevents current from the regulator flowing back to the ignition power relay when the key is turned of"
The MSD relay for the same purpose not mentions any diode.



If you follow my method, you're hooking it to the starter solenoid, not the voltage regulator. I have my MSD 6AL wired like this and it works perfectly.

Got it, and it will probably work with the ready to run distributor too without the MSD ignition box.
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#9
(06-11-2019, 01:26 PM)Don C Wrote: Your car must be equipped with factory gauges and as such you don't have the alternator warning light and a wire connecting to the "I" terminal on the voltage regulator.

This leads to my question, do you have the factory tachometer? If so, it will no longer function, unless you run the coil from the bypass resistor wire and the Pertronix from the relay, or have Rocketman convert your factory 2 wire tach to a 3 wire tach. You can read more here
https://www.7173mustangs.com/thread-pert...ctory-tach?

Yes factory tach so it's likely won't work. I'm running MSD ready to run dist. and want to hook it up to the Pertronix relay.
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#10
You'll need to run an MSD tach adapter if you want your tach to work.


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