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Old 09-30-2008, 12:44 PM   #1 (permalink)
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Trying to determine what this interface is

I recently bought a 83 CJ8 which has been modified both mechanically and electrically.

The PO has taken the Duraspark ICM out of the loop and had wired in a Control Module from a 75 Pacer (don't know why he choose that one).

I'm going to pull the MSD box from my other jeep and put it in this one but while I do that I want to simplify the electrical wiring, clean it up.

Near the battery on the driver's side of the engine compartment is a bracket hosting an electrical interface. It consists of two parts (plugs), one has more pins than the other. Looks like it might have been for diagnostics but I don't know for what. Currently it has the Howell TBI system on it but I don't believe this is associated with that system. I have no idea what it is.

Anyone know?

Could this be an Emmissions Control Module interface?

I'm in Florida but don't know if this jeep came from a state with Emmission Control Laws.

Thanks,
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Old 09-30-2008, 01:17 PM   #2 (permalink)
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a picture would definately be helpfull in this case
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Old 09-30-2008, 02:00 PM   #3 (permalink)
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ok, I will get one tonight when I get home.

Thanks for the reply.
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Old 09-30-2008, 02:41 PM   #4 (permalink)
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I believe you are looking at a 'test port' setup that the factory used to make sure the electrical system was all operating correctly before it left the assembly line.

I believe that a dealership MAY have had some simple electrical diagnostic capabilities through that 'interface'. But it is nothing like a data port.

Electrical, not electronic.

peace
Dave

(pics will help)
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Old 09-30-2008, 02:52 PM   #5 (permalink)
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Quote:
Originally Posted by rustywagoneersdotcom View Post
I believe you are looking at a 'test port' setup that the factory used to make sure the electrical system was all operating correctly before it left the assembly line.

I believe that a dealership MAY have had some simple electrical diagnostic capabilities through that 'interface'. But it is nothing like a data port.

Electrical, not electronic.

peace
Dave

(pics will help)
The 83' had a computer. It is under the dash, passenger side. It could make changes to timing and fuel based on inputs from sensors in the carb. The ports that "talked" to it are the ones you are referring to. Primitive shit.
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Old 09-30-2008, 02:54 PM   #6 (permalink)
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The two plugs on the drivers side (just under the bulk-head fitting) are for the factory duracrap igntion that was mounted to the drivers fender well. The majority of the wires running behind the engine on the firewall are for that, so you should be able to split the loom and remove a ton of wires. It's probably way better off with that pacer ignition than with the factory. Or if you wanna be fancy then do an HEI conversion then you'll just have 2 wires at the distributor ... and cheaper than your huge MSD box that you'd have to put somewhere anyway.
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Old 09-30-2008, 04:11 PM   #7 (permalink)
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Quote:
Originally Posted by YJ_and_Corey View Post
The 83' had a computer. It is under the dash, passenger side. It could make changes to timing and fuel based on inputs from sensors in the carb. The ports that "talked" to it are the ones you are referring to. Primitive shit.
He speaks the truth.

More electronic than I was giving it credit for.

Still way rudimentary stuff....
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Old 09-30-2008, 04:33 PM   #8 (permalink)
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Ok, here's a pic

http://iearts.embarqspace.com/#/welcome/4530789244

Thanks for all the replies.

Like I said, I want to remove this stuff, remove the duraspark stuff, remove the pacer stuff, and just install the MSD ICM from my other jeep.

Then, in that jeep I'll put the HEI module.

Please confirm what this is.

Thanks in advance,
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Old 09-30-2008, 06:27 PM   #9 (permalink)
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It is the diagnostic connector YJ and Rusty mentioned. Everything you could want to know about it and the rest of the computer controll is here.
http://home.sprynet.com/~dale02/diagnost.htm
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Old 09-30-2008, 06:52 PM   #10 (permalink)
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Fantastic!!!!!

Thanks much!
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