Trying to figure out these connections behind the dash on 88 YJ

C

CPucci41

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Bethpage, New York
Hi All, this is my first post. Thank you for the add. I am working on restoring a 1988 YJ. The PO had completed a bunch of questionable electric upgrades including footwell lighting, alarm system etc.

I am in the process cleaning up the wiring and pulled the dash. However I have a handful of connectors that were in-plugged or taped off. As I was taking the dash apart I was marking each connection and what it went to.

trying to make heads or tails of what these connectors are below.

one connector has three wires going to it and was taped off. The red and black connectors were not hooked up to anything. It’s a 88 YJ S did Jeep use the same harness on all jeeps.

-chris

AD0E2AEF-954B-4D29-8881-D8F1142338DF.jpeg


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CPucci41 said:
Hi All, this is my first post. Thank you for the add. I am working on restoring a 1988 YJ. The PO had completed a bunch of questionable electric upgrades including footwell lighting, alarm system etc.

I am in the process cleaning up the wiring and pulled the dash. However I have a handful of connectors that were in-plugged or taped off. As I was taking the dash apart I was marking each connection and what it went to.

trying to make heads or tails of what these connectors are below.

one connector has three wires going to it and was taped off. The red and black connectors were not hooked up to anything. It’s a 88 YJ S did Jeep use the same harness on all jeeps.

-chris

View attachment 116653

View attachment 116654
Click to expand...
In your first post, the red one (C220 in photo) is for hardtop defrost and black one (C221 in photo) is for fog lights. All Jeeps came with the same harness as the rest of their year regardless of options, so you have fog and hardtop plugs dangling behind the dash even though you aren’t using them.

Not sure about your second pic, is that three wires running to it? It’s hard to tell what it could be without some more picture angles.

1DB5AE01-1A29-4941-A8C6-9278E1058CA0.png
 
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Thanks macho, is it possible that smaller connector with 3 wires to is was for a courtesy light?

PO installed aftermarket courtesy lights there is a pink and black/white wire on the passenger side that were cut with no harness just hanging behind the dash. They appear to be the same wires.

Added an additional pic
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CPucci41 said:
Thanks macho, is it possible that smaller connector with 3 wires to is was for a courtesy light?

PO installed aftermarket courtesy lights there is a pink and black/white wire on the passenger side that were cut with no harness just hanging behind the dash. They appear to be the same wires.

Added an additional pic
View attachment 116743View attachment 116744
Click to expand...
It’s possible and likely probable. Courtesy light is what I was thinking but the fact that you have 3 wires threw me off. My 1995 service manual shows 2 wires. Granted a lot of things changed from the 80s to 1995 YJs, but I figured that one would be the same.

Your wire colors match what the manual shoes though. See pic below of C307 and C308.

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machoheadgames said:
It’s possible and likely probable. Courtesy light is what I was thinking but the fact that you have 3 wires threw me off. My 1995 service manual shows 2 wires. Granted a lot of things changed from the 80s to 1995 YJs, but I figured that one would be the same.

Your wire colors match what the manual shoes though. See pic below of C307 and C308.

View attachment 116745
Click to expand...
 
Macho,
where are you getting these beautifully crafted manual photos? Ive looked hi/lo for just the thing....
Can you share your resources or is it top secret documents ?
 
Doug Boudreaux said:
Macho,
where are you getting these beautifully crafted manual photos? Ive looked hi/lo for just the thing....
Can you share your resources or is it top secret documents ?
Click to expand...
Resources section has a bunch of factory service manuals that you can download. All that stuff is in the wiring section at the end of section 8W. It is extremely handy info to have.
 
the free service manual covers all this, ever see it. in sticky.
this forum has 1000s of links to the sticky , and manuals(click me)
I have more, lots more. 88 to 2010 on my server.
those are called FSM OEM jeep Service manuals.(factory) 2000 pages. every wire shown in full detail just like new cars have too.
if you own an old car and do your own work get the FSM first. and avoid working in a vacuum.

1988 2.5L New York. left hand drive LHD, (matters that) for most parts up front.
i think 87/88 is same thing

87 fsmthe 87 fsm is here, free too at proton.

drive.proton.me

Proton Drive

Securely store, share, and access your important files and photos. Anytime, anywhere.
drive.proton.me drive.proton.me

89 is here
drive.proton.me

Proton Drive

Securely store, share, and access your important files and photos. Anytime, anywhere.
drive.proton.me drive.proton.me

one of the other matches, (for engine +EFI , a match up i s best) both are TBI 2.5L

also learn
all cars made have connectors going to no where. called options not put in new day1, or removed by others 35 years later.(OR WHO KNOWS)
no maker of cars makes a unique harness for all permutations of options, as that be crazy and very expensive. (they keep that to a minimum!)
so they dangle, new cars they are tied back, but not 35 years later,?

or added aftermarket parts added then later removed, and a huge mess. bingo?
so the FSM solves that. shows what is stock, and what to do , to remove hacks or get it right.
schematics.(read them,see those color coded wires ,bingo stock wires)

FYI, My LARGER MANUAL MUST BE DOWNLOADED TO VIEW it FIRST. THEN USE FIREFOX TO VIEW IT OR ANY BROWSER THE SUPPORTS PDF.
GOOD LUCK UNTANGLING WIRES
 
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