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post #1 of (permalink) Old 06-13-2004, 08:08 PM Thread Starter
 
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Stupid Wiring Question--\'85 CJ7

1985 CJ7, 258, t-5, PS, PB, no a/c, had a stereo and remote heater, now gone.

First a very fast bit of history. PO had the ignition switch in the column go out. Rather than replace it, he ran all new wires and put in a second ignition switch on the dash--cutting the existing wires at the firewall. So you would have to turn the key on the dash to "on" for any accesories to run, and then use the ignition switch on the dash to start the jeep. Then another thoughtful soul decided that the "computer" (ECM?) was too complicated and converted the distributor over to points. Not too big of a deal(since I plan on grafting in a 4.6L stroker in a year or so) since poiints are simple, but it leaves me with some rather strange wiring under the hood.

First stupid question: Were factory black wires ALWAYS ground? Case in point, I have 2 black and 1 black w/white stripe coming off a common ground on the frame that have been cut off at the length of about 2'. Nearby is a pigtail going to the tranny and t-case that has a black wire coming from it that was cut off at about 3". Logic dictates that this is a ground wire and I should hook it into one of the orphan ground wires. However, could I be wrong?

Second stupid question: There is a connector that has a multiplicty of wires coming off of it that have further pigtails going to a pair of Bosch units that look like relays. Are they part of the now defunct computer system and safe to get rid of.

My goal is to simplify the wiring to the point that I don't have anything nonfunctional in the way. However, I don't want to shoot myself in the foot for the later stroker conversion. Any advice would be greatly appreciated!

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post #2 of (permalink) Old 06-13-2004, 08:54 PM
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Re: Stupid Wiring Question--\'85 CJ7

Mine was similar, push button starter, switch for accessories on the column. All the other computer wiriing had been chopped or removed. What I did was just open up the whole engine harness and pull out anything that wasn't needed or hooked up. Wired it according to a 79 CJ diagram. I don't remember any grounding wires that would go to the tranny or transfer, but it couln't hurt. There is suppose to a wire to the transfer to tell when 4wd is engaged, maybe that is one of them.
HTH

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post #3 of (permalink) Old 06-13-2004, 09:00 PM
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Re: Stupid Wiring Question--\'85 CJ7

</font><blockquote><font class="small">In reply to:</font><hr />
First stupid question:

[/ QUOTE ]

No stupid questions here (sometimes stupid answers).

</font><blockquote><font class="small">In reply to:</font><hr />
Were factory black wires ALWAYS ground?

[/ QUOTE ]

I can't think of any that were not... but that is not reliable because the wire color even changes in some connectors. I can't be sure of the harness you are talking about but I would have to guess it's the 4WD and Backup Light Harness going to the trans/transfer.

</font><blockquote><font class="small">In reply to:</font><hr />
There is a connector that has a multiplicty of wires coming off of it that have further pigtails going to a pair of Bosch units that look like relays. Are they part of the now defunct computer system and safe to get rid of.


[/ QUOTE ]

Yep that's part of the Pulse Emissions System, your point distributor likely took care of that. Careful there are +12 lines in there, don't leave them hanging to short out.

There is about five pound of wire and connector in there that isn't needed if you ditch the original emissions control.

Hope this helps... I have some links and will search for them...

Dale
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post #4 of (permalink) Old 06-13-2004, 09:27 PM
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Re: Stupid Wiring Question--\'85 CJ7

OK... yes I'm posting a reply to myself... get the straight jacket.

A couple of links:

Jeep Adventures Under the Hood

A Primer on the Jeep 258 with Carter BBD

Credit to Dale Beckett and LEVE

Lots of info on the original Pulse Air system... could be used to remove most of those parts if that's what you want.

I have two that still function (well mostly) as they were designed to.

An interesting thread I found while searching:

Vacuum reservoir and charcoal canister

There are additional wiring diagrams linked by LEVE in resent posts.

More ? [img]images/graemlins/crazy.gif[/img]

Good Luck

Dale
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post #5 of (permalink) Old 06-13-2004, 09:49 PM Thread Starter
 
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Re: Stupid Wiring Question--\'85 CJ7

Thanks! I'll do some reading before I post any more stupid questions!

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post #6 of (permalink) Old 06-13-2004, 09:54 PM
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Re: Stupid Wiring Question--\'85 CJ7

No stupid questions here (sometimes stupid answers).
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