Humbly asking for help once more.... -

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post #1 of 8 Old 09-26-2011, 05:24 PM Thread Starter
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2003 TJ Wrangler 
Join Date: Dec 2008
Location: Camp Pendleton
Posts: 463
Humbly asking for help once more....

Ok ladies and gents....another dreaded wiring question. I'm starting to think I'm in over my head on this one. When I purchased my 78/82/84 CJ7 the PO had hacked the stock wiring harness all to pieces. So I stripped it out and bought a 21 Circuit Universal Harness w/ prewired fuse block. I've got a majority of the wires in their respective bundles laid in the places where they need to go (tail section is in the back, interior is under the dash, and the engine bay is ran through the fire wall). Here's where I am stumped, on a majority of the wires for the engine compartment, I have NO CLUE where they are supposed to go. Here is a list of the wires that come through the firewall:

Solenoid Power
Alt Power
Temp Sensor
Alt Exciter
Coil Pos
AC Compressor
Power Antenna
Choke Power
Oil Sending
Left Low Beam (Splits to Right Low Beam)
Left High Beam (Splits to Right High Beam)
Left Front Park (Splits to Right Front Park)
Ign Start Switch
Right Front Signal
Left Front Signal

Here's what I know about the motor as of right now:
1982 AMC 258 4.2L
Offenhauser Intake
Holley 390CFM 4BBL Carb
Mallory Distributor

If you guys would kindly point me in the proper direction as to where the wires are supposed to go, I would be greatly appreciative. I've tried following the Haynes manual schematic, but let's be honest - I'm a Marine, I need pictures.

Here is what I am working with:

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post #2 of 8 Old 09-26-2011, 05:32 PM
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1977 CJ7 
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I don't know if this will help. It is a mix of years on one page, but, if you take the time a trace them out, it might help. It can be printed and taped together, too.

'77 CJ7 Golden Eagle: Cummins 4BT, NV4500, NP205, Old Man Emu 2.5" YJ conversion lift, 3.31 stock NT axles (with 2" spacers), 32x10.5-r15 Good Year Wrangler Authority
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post #3 of 8 Old 09-26-2011, 07:28 PM
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The Haynes can leave a lot to be desired. The link to the factory 82 manual is below. Wiring can sometimes be confusing even to an old sparky like me. Start by working with what you know and do not cut anything. Seperate the wires according to where they go in the engine compartment. Solenoid, alternator, coil, headlights, etc. to the left side. If you're not sure where a component is, look it up in the factory manual. Loosely cable tie the larger bundles together and hang them off the firewall or fender. When you get to a component with multiple wires, look up that particular item in the manual. For example, the section on the alternator will tell you which terminal on the alternator gets which wire. Take your time. You want it all to work the first time. Before you terminate anything, get some of the loom material (overwrap for bundles) and pretty it up. I would try and get an understanding of every wire and exactly where it goes before I start terminating anything. Figure out what type of terminal you'll need to install on the end of the wire and have it on hand. Try not to go cheap here. If using stak-ons, buy a tool just for crimping stak-ons and not a universal type. You'll get better crimps. Soldering is better but that takes more skill. Don't forget heat shrink. The kind with the adhesive is best, but hard to find. Do it right the first time and you won't have to mess with it for years. You may want to check into weatherpack connectors as well. Hope this helps.
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post #4 of 8 Old 09-26-2011, 08:03 PM
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Also, and I feel you on the need for pictures, but when I was wiring my 84 CJ7, I went and bought a cool book on automotive wiring. At first I was afraid I wouldn't be able to follow it, but the author used pictures and made it very readable to normal people. It wasn't a sole source or anything, but it was a hell of a primer that let me get the basics of the harness and what does what and why, and then I had a LOT more luck with being able to follow diagrams and whatnot. I think the whole thing was maybe 100 pages, but like I said it was very readable, got through it in a couple of afternoons and it made a world of difference if you're just starting out with wiring.

The book is "Automotive Electrical Handbook," published by HPBooks, and the author is Jim Horner. I think I found it on Amazon a couple of years ago, now it's well-worn and highlighted. If you're looking for a broad-overview starting point, this has worked for me.

Good luck man!
-Mike M.
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post #5 of 8 Old 09-26-2011, 08:06 PM
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1985 CJ7 
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Thanks for your service SgtJensen !

Don't let the mess of wires scare you off, looks like you got a good start on things.
Let's start with whose harness it is and if it came with a manual?

I've used a Summit Racing universal harness in the past on another project and their manual left a whole lot left to be desired especially if this is your first go at something like this.

one suggestion i will make to you is start with where everything is going to go and eliminate what you aren't going to use.

i would put them into sub groups like this:

Lights/Horn: - all of these will go forward towards the grille to their destinations
Left Low Beam (Splits to Right Low Beam)
Left High Beam (Splits to Right High Beam)
Left Front Park (Splits to Right Front Park)
Right Front Signal
Left Front Signal

Engine all of these will go to the engine and terminate at their destinations
Oil Sending
Temp Sensor
Alt Power - to altenator
Alt Exciter - to altenator

Ignition Module and/or Coil these wires will connect at either your ICM and/or Coil depeding on what you are using
Ign Start Switch
Coil Pos

Starter Solenoid this wire will go to your starter solenoid
Solenoid Power - trigger wire for starter solenoid

these are wires you may not be using:
Fan - for electric radiator fans
AC Compressor -
Tachometer - if you have a tach this can go with ICM/Coil bunch
Power Antenna -
Choke Power - if you have Elec. Choke on your Carb. this can go to the engine group

from here you can chase down wiring schematics for individual components as needed to see where each individual wire goes to for your particular application
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post #6 of 8 Old 09-28-2011, 07:28 AM Thread Starter
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Thanks for the advice and direction...suddenly not so intimidating...

Staff Sergeant of Marines - January 2003 - Present
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post #7 of 8 Old 09-28-2011, 08:13 AM
John Strenk
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post #8 of 8 Old 09-28-2011, 09:29 AM
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maybe this will help some...
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CJ wiring colored.jpg  

Torque is the measure of force that gets the cap off your beer.

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