Topic: Under dash wiring changes?

[czjeeper]

I've got a '92 YJ.
The under dash harness is thrashed from the PO.
I bought a totally mint, uncut harness from Ebay.
It was advertised as a 92-95 harness.
It has the hardtop plugs for the wiper, and defrost. Not sure if that places it for age or not.
Anyway, I installed it and everything worked but it wouldn't turn over. The accessory, and run positions both worked, but the starter never kicked over.
Anybody know anything about the years of harness changes?

[Jeffy]

Did you reseat the plugs?  Especially the ones on the column?  I would suspect that the wiring is the same.  Maybe there is a minor change in pinout?  There is really no way to tell what the harness is actually from unless you can match the color of the individual wires to a FSM.

[czjeeper]

Yeah, everything was inserted good.
Many of the wire colors were totally different on the plugs.

[Jeffy]

Yeah, everything was inserted good.
Many of the wire colors were totally different on the plugs.

Well, list the colors of the harness for the ignition.  I can look up '91, '92, '94 and '95.

[czjeeper]

I was under the impression that the 92-95 harness was the same?
Here are the plugs that go into the steering column wiring.
My original 92



The "new harness"

[czjeeper]

And here are the plugs for the ignition switch.

[aw12345]

Trace the wire that gets hot in the start position at the ignition switch and follow it in the connectors to the bulkhead plug. Match it with the wiring diagram. If all else works then just reworking the wire for the starter solenoid should be an easy fix

[Jeffy]

The harness is at least a '94-'95  Could be '93 but it's not a '91 or a '92.  The pin-outs are the same for the steering column, indicator plug though.

The 18YL on the blue plug is for the starter.  The 12RD is your main power from the Power distribution.

I would probably trace the starter wire to make sure it's not open.

[czjeeper]

So, technically, this harness should work?

[Jeffy]

So, technically, this harness should work?

I believe it should.

[czjeeper]

The harness is at least a '94-'95  Could be '93 but it's not a '91 or a '92.  The pin-outs are the same for the steering column, indicator plug though.

The 18YL on the blue plug is for the starter.  The 12RD is your main power from the Power distribution.

I would probably trace the starter wire to make sure it's not open.

I traced the yellow wire on the new harness, and it is good from ignition plug to PDC plug.
On MY harness the ignition plug wire routes over the steering wheel to the drivers side.
So it looks like this wire gets power from the fuse box instead of the PDC plug in the middle of the firewall...

[Jeffy]

I traced the yellow wire on the new harness, and it is good from plug to plug.
On MY harness, the wiring on the blue ignition plug and the PDC plug are not the same.

So they're not in the same locations?  You can always take apart the plug and relocate the wire to the correct port.

[czjeeper]

So they're not in the same locations?  You can always take apart the plug and relocate the wire to the correct port.

Sorry, I clarified my last post.
I guess my '92 is getting power for the ignition switch from the drivers side fuse box?

[Jeffy]

14VT goes to the fuse box #7 and controls the turn signals and wiper.

[czjeeper]

Okay, is the yellow wire on this plug here the 18YL you talked aobut earlier?


it goes to the yellow wire on this plug


On my '92 harness the wire in the same location is Green


But doesn't go to this plug (PDC, center of firewall)



Or am I totally screwed up and looking for the wrong wire?