CJ Wiring Question

[Rescue Diver]

I'm almost done installing the wiring harnesses. I have no idea what year the under dash wiring came from. It's in really good shape with no splices. It has the plastic blade fuses so I'm guessing it's from an 80's Jeep. I have one connector that I'm not sure what it's for. It has a yellow, and a yellow with stripe wire that go to a flat plug. The wires are pretty long. Does anyone know what this is for? Backup lights maybe? Nutral Safety?

I've found all kinds of wiring diagrams online, but I can't seem to locate this plug. Does anyone have a link to a good color code chart for CJ wiring?

 

[Tommy]

My book shows the '79 yellow wire going to the voltage meter in the dash. In the '80-'83 diagram it goes to the windshield wipers/washer switch. Hope this helps.

Tommy

 

[Rescue Diver]

My book shows the '79 yellow wire going to the voltage meter in the dash. In the '80-'83 diagram it goes to the windshield wipers/washer switch. Hope this helps.

Tommy

The volt meter has a heavy yellow wire to it. The wiper switch also has a red and a yellow wire going to it, besides the three wire wiper motor plug. That yellow is for the washers. The ones I'm having trouble identifying are a pair of thinner yellows, one with a stripe, probably 14 gauge, that both go to a single flat plug. They're pretty long. They hang about a foot and a half from under the dash.

 

[Tommy]

The only other yellow wire I see in my Haynes book goes to the tachometer for a 4 cylinder. I know these wiring diagrams in the book aren't the best but it's all I have. Good luck. It seems that wiring on any Jeep is hit or miss. If I come across anything else I will pass it on.

Tommy

 

[Rescue Diver]

The only other yellow wire I see in my Haynes book goes to the tachometer for a 4 cylinder. I know these wiring diagrams in the book aren't the best but it's all I have. Good luck. It seems that wiring on any Jeep is hit or miss. If I come across anything else I will pass it on.

Tommy

Thanks Tommy!

The wiring diagram I've been looking at online for a 1978 seems to have what looks like a plug with yellow wires but it's fuzzy and hard to read blown up. I think it says Transmission something, so maybe it's the nutral safety switch wires that need to be jumpered since it has a 4 speed? If it won't start when I'm done, I'll try jumpering it with a fuse so if I'm wrong, it'll just pop it instead of frying something.

 

[Tommy]

Going back to the '79 diagrams, there are two possibilities. There is a yellow wire going into and another coming out of the Transmission kick down switch. And then there is a yellow wire that splits like you are talking about and goes through the ignition switch to the Neutral Safety switch for a manual Transmission . That goes along with your guess.

 

[Rescue Diver]

Going back to the '79 diagrams, there are two possibilities. There is a yellow wire going into and another coming out of the Transmission kick down switch. And then there is a yellow wire that splits like you are talking about and goes through the ignition switch to the Neutral Safety switch for a manual Transmission . That goes along with your guess.

Thanks again. It'll all be a lot easier in a few days when I get delivery of the battery tray. Once I power it up, I'll have an easier time figuring it out.

 

[Rescue Diver]

Here's a question that any CJ owner can answer for me. Where does the wiper motor wiring pass through the dash or tub? I'm guessing it goes through the tub under the windshield seal since there's no hole in the factory dash for it to go through. Since I have a new fiberglass tub and no old one to copy, I'm relying heavily on internet pics and info from other jeep owners.

 

[Rescue Diver]

Going back to the '79 diagrams, there are two possibilities. There is a yellow wire going into and another coming out of the Transmission kick down switch. And then there is a yellow wire that splits like you are talking about and goes through the ignition switch to the Neutral Safety switch for a manual Transmission . That goes along with your guess.

I've been working on it again tonight and I've isolated most of the under hood wires. Back to the under dash stuff I haven't identified, I actually have three plugs I'm not sure about. There's the two solid yellow long wires that go to a flat plug, and a white with black stripe and a red going to a flat plug, and the last one is two solid blue wires that go to a square plug.

Here's a pic of them.

 

[dslywalker]

Here's one I have for a 79.

 

[Rescue Diver]

Here's one I have for a 79.

Thanks. I've actually been stairing at that same diagram a lot lately, but I'm sure the harnesses I have are later than 1979, so I have some things that aren't listed in it. It was really handy for under the hood wiring though. The only exception I've found is that the two green wires for the backup lights don't have stripes even though the diagram says they do. If all else fails, the extra wiring and plugs shouldn't hurt anything if everything works. I wonder if the two blue wires go to an Air conditioner switch? I know the under hood wiring has a solid brown wire to go to an AC compressor.

 

[dslywalker]

Here's one from a 78 .It was listed as special to that model for some reason

 

[dslywalker]

I have a few more diagrams I'll look at to see if they match yours
Mike

 

[dslywalker]

White should be the backup lites.Only blue i see is going to the solenoid and brown is the A/C

 

[Rescue Diver]

White should be the backup lites.Only blue i see is going to the solenoid and brown is the A/C

I'm pretty sure the backup light's wires are a pair of white's with black stripes that are part of the under the hood harness. They start out as two green wires on one connection and one white wire with a black stripe on the other. They then go through a pair of plugs and switch to being a pair of white wires with black stripe

The brown is definitely for an AC compressor. Every diagram I've seen has that one listed. Guess I'll be trimming it out since it's highly unlikely I'll ever add ac to the cj.

You're right. The blue your talking about is already connected to the solonoid. I have the under the hood part totally figured out. It's just the three plugs under the dash that I haven't identified.

 

[dslywalker]

got a picture of that plug

 

[Rescue Diver]

got a picture of that plug

Which one, the backup light plug? I don't have a picture of it. It starts out as two greens joined into one connection on a plug while the other connection on it has a white with stripe. Those wires are under the hood and come out of the harness just a couple feet from the firewall plug so they're right in the middle of the firewall, directly behind the motor. That plug connects to another plug with two whites with stripes that are just long enough to reach the top of the tranny. The plug on the tranny end doesn't match the backup switch, but I have a plug from another harness that does, and it has a green and a white going into it.

The unidentified under dash plugs are in a pic I posted earlier. I pretty much have it all figured out. Everything that needs to be hooked up under the dash is already taken care of. I'll probably spend a little time identifying the three plugs after I have everything else done since they don't seem to be needed. They're probably for A/C and maybe a tach.

What I do still need help with is how the wiper motor wires pass through the dash or top of the body tub to the back of the instrument panel. So far no one has answered that for me, and I'd really like to get that taken care of.

 

[dslywalker]

I got a 83 the wiper wires pass up under the cowl seal.There's a slotted hole where they go threw below the motor.Feed them up threw the hole behind the dash.You'll have to have the window down to see the hole then strait to the motor.

 

[dslywalker]

Did your yellow wires with the the plug go into the ignition switch.Blue wire was neutral switch.

 

[Rescue Diver]

Did your yellow wires with the the plug go into the ignition switch.Blue wire was neutral switch.

From the flat plug with the two yellow wires, one goes to the wide steering column plug, and the other goes into the big wire bundle to god knows where.

When I briefly hooked up a battery a couple days ago, the solonoid would kick when I turned the key without having a jumper on anything, so I don't think the plug with two blue wires is for the nutral safety.