Under-Dash Connector ID/MESS

[Boltjd]

I need some help here. I have a 1988 Comanche Pioneer 4WD M/T and I'm trying to clean up the wiring harness under the dash. There are qiite a few connectors that are missing their 'mates' and it concerns me. I did take out the HVAC box, due to a leaking heater core and a botched removal job, so it could be a few connectors that were once attached to those. Also, the first owner crafted a 'kill switch' and did somw of his own modifications. I also removed an anti-theft device (Clifford IPS box), and I wasn't sure if that was OE or not. I've added some pictures, and if anybody answers, I will take some more tomorrow and post them. There is in particular, a white connector, a fuse holder that seems to be coming from the horn/anti-theft light behind the dash, which is grounded to the starter relay, a connector with 4-pins and 4 wires, one of which (black/tan) was cut off, and a Bosch relay connector that seems to have one of the blade terminals bypassed, so that there are only 4 out of 5 blade terminals and two are connected by a black link. I've scoured wiring diagrams online and I've had no luck. Any help is appreciated!

[cruiser54]

There will be connectors without mates depending on the equipment/options on the truck.

If you want to post photos of the ones you're concerned about, after removing the obvious butt-connected crap, we'll see if we can help.

[Andy in Pa]

 

11 hours ago, cruiser54 said:

There will be connectors without mates depending on the equipment/options on the truck.

If you want to post photos of the ones you're concerned about, after removing the obvious butt-connected crap, we'll see if we can help.

 

I went through this recently too, and there are some extras, especially with a 5 spd.  A critical thing that helped me immensely is printing out the electrical schematics from one of Cruisers links.  In his post above, click on his website.  Lots of helpful info in there.

[Boltjd]

Thank you for the quick replies and apologies for my belated response. I appreciate the link to Cruiser54's website. I've got some pictures of some connectors I'm concerned about and can't easily find identification. This first series shows a relay and connector which to me does not seem original, but when I unplug the relay, the accesory power turns on, but the vehicle will not turn over. The loose wires came from an anti-theft box I removed, and the other three striped wires split a green wire, and the other seems poorly soldered into a yellow wire. As I mentioned in the original post, the original owner installed a kill switch, which was hooked up to a lock cylinder in the drivers side fender, and the wire connected to it is green.

[Boltjd]

The next series are two connectors that come from the harness connected to the fuse box. I do not know what purpose they might have.

[Boltjd]

The first photo is very confusing to me, as there are a series of wires once connected to the anti-theft box that lead through the fire wall, fuse at the black box in the second picture (the links are pictured at the bottom, slightly to the left, next to the MAP sensor connector), which splits at the horn, and then breaks off into a black wire which contains an odd fuse plug-thing which is pictured in the original post and ends in a ground which was grounded at the ignition starter relay. The third protrudes from a loom passes near the charcoal canister. The fourth photo is right off of the C101 connector; I assume it is a diagnostic connector or something. Any help is appreciated.

[87MJTIM]

4 hours ago, Boltjd said:

The next series are two connectors that come from the harness connected to the fuse box. I do not know what purpose they might have.

The top photo is for the windshield washer pump to a rear window sprayer.  It's a hold-over from XJ wiring.  Jeep had one harness for both MJ & XJ windshield washer systems.

 

The second picture is hard to see what it is.

[Warren Mohler]

top low washer fluid, washer pump lower

[Andy in Pa]

1 hour ago, Warren Mohler said:

top low washer fluid, washer pump lower

Yes, this... Just hooked my washer pump up.  My MJ did not have the Low Washer Fluid indicator, so its just hanging out in there as well.

[jdog]

Thank you for the quick replies and apologies for my belated response. I appreciate the link to Cruiser54's website. I've got some pictures of some connectors I'm concerned about and can't easily find identification. This first series shows a relay and connector which to me does not seem original, but when I unplug the relay, the accesory power turns on, but the vehicle will not turn over. The loose wires came from an anti-theft box I removed, and the other three striped wires split a green wire, and the other seems poorly soldered into a yellow wire. As I mentioned in the original post, the original owner installed a kill switch, which was hooked up to a lock cylinder in the drivers side fender, and the wire connected to it is green.

Still part of the kill switch, connect the two greens and remove any of the white with stripes and the relay

Stock 1988 swb 4.0 ax15 np 231.

[jdog]

The first photo is very confusing to me, as there are a series of wires once connected to the anti-theft box that lead through the fire wall, fuse at the black box in the second picture (the links are pictured at the bottom, slightly to the left, next to the MAP sensor connector), which splits at the horn, and then breaks off into a black wire which contains an odd fuse plug-thing which is pictured in the original post and ends in a ground which was grounded at the ignition starter relay. The third protrudes from a loom passes near the charcoal canister. The fourth photo is right off of the C101 connector; I assume it is a diagnostic connector or something. Any help is appreciated.

Third is for the hood light.

Stock 1988 swb 4.0 ax15 np 231.