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post #1 of (permalink) Old 07-04-2009, 10:33 AM Thread Starter
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Thumbs up What did this plug and wires connect to?

In my hunt to the get backup lights working, I came across this two wired plug. This female connector is round and looks to accept two male bladed connectors. The red wire has a white trace and goes somewhere in the main 85 wiring armor covering and looks to be about 10 gauge. The blue wire is much smaller and goes into the CJ electrical bulkhead connection. Any idea what this was used for? Thanks


1985 CJ with a transplanted 94YJ 4.0L motor, T176 tranny, mainly stock otherwise. ><>
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post #2 of (permalink) Old 07-04-2009, 11:24 AM
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Where is it located?

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post #3 of (permalink) Old 07-04-2009, 11:37 AM Thread Starter
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Quote:
Originally Posted by Jim_Lou View Post
Where is it located?
Right now it is hanging over the washer bottle. The pigtail is about 16 inches long. The blue wire runs straight back into the CJ firewall electrical connector.

1985 CJ with a transplanted 94YJ 4.0L motor, T176 tranny, mainly stock otherwise. ><>
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post #4 of (permalink) Old 07-04-2009, 01:11 PM
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Is this them? It went to the ignition module. I’ll guess that it is not used on the ‘puter controlled models.
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post #5 of (permalink) Old 07-04-2009, 03:04 PM
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That does look like the plug for the Duraspark module.....

It looks like you have done the Mopar FI conversion which means all the Mopar stuff comes out.

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post #6 of (permalink) Old 07-05-2009, 11:40 AM
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That is the POWER PLUG for the facotry ignition DuraSpark module.

Large 'Red' with white trace, and blue wire.

Large 'Red' is the primary 'Run' power wire connected to the ignition switch.

Smaller 'Blue' is the 'Start' or 'Crank' power to the module when you are trying to get the engine started.
Powering up this circuit in the module retarded the timing about 8 degrees so the engine started easier when 'Hot' and compression was high.

If you decide to cut that wire out, there are people on the forums looking for that harness side connector,
So if you want to pass it on, make sure you cut it out with enough wire they can splice it into their harnesses...

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post #7 of (permalink) Old 07-05-2009, 12:01 PM Thread Starter
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Thank you guys, I really appreciate your wisdom. It took months, but when I lifted out the 258, I left the entire orginal AMC harness in and did not hack anything. Then I dropped in the 94 4.0 with OEM engine wiring harness and computer. At that point, with 85 and 94 OEM service manuals, we began the sorting out the needed wires to make the 94 engine fire and run. I have a few 1985 wiring items left over and this one. I would be happy to share this harness side connector, just let me know.

Down the road, should I want to add a winch or electric snow plow lift, can I tie into this red wire with whire stripe or should I look elsewhere? I don't know how much this circuit can handle. THanks, Duane

1985 CJ with a transplanted 94YJ 4.0L motor, T176 tranny, mainly stock otherwise. ><>
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post #8 of (permalink) Old 07-05-2009, 03:24 PM
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Quote:
should I want to add a winch or electric snow plow lift, can I tie into this red wire with whire stripe or should I look elsewhere?
Look elsewhere. That won't come close to handling a heavy load. Think battery cab, size.

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post #9 of (permalink) Old 07-05-2009, 05:32 PM
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Quote:
Originally Posted by DuaneD View Post

Down the road, should I want to add a winch or electric snow plow lift, can I tie into this red wire with whire stripe or should I look elsewhere? I don't know how much this circuit can handle. THanks, Duane

That same circuit supplies current
To the alternator 'Excite' terminal,
To the ignition coil via a resistor wire,
And it should be fused for 3 to 5 amps.

I would say it's a BAD IDEA to connect anything else to that circuit.

I would have to really knuckle down and give it some thought, but I probably wouldn't use that circuit for anything but activation of relays that need to be 'ON' when the ignition switch is in the 'Run' position.

If you were going to wire a plow by using control relays,
They you could get away with that easy enough!

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