Engine Wiring Harness Installation Guide?
Thread Starter
Heel & Toe
Joined: Mar 2012
Posts: 18
Likes: 0
From: Twentynine Palms CA
Engine Wiring Harness Installation Guide?
I bought a new engine wiring harness for my 1972. Does anyone have an installation guide or instructions for a C3 engine wiring harness?
Team Owner
Joined: Sep 2006
Posts: 31,218
Likes: 4,303
From: Westminster Maryland
Hi d,
The engine harness is a pretty easy one.
If the old one is still in place I'd lay the new one roughly in place and unhook, (old), and then hook, (new), the connectors one at a time.
When they're all connected I'd remove the old harness and tuck the new harness in place in the various clips and clamps.
If you don't have the Assembly Instruction Manual you may want to think about buying one. It will show just how the original was run and where the connections are.... and a zillion other things it will be good to know.
Good Luck!
Regards,
Alan
The engine harness is a pretty easy one.
If the old one is still in place I'd lay the new one roughly in place and unhook, (old), and then hook, (new), the connectors one at a time.
When they're all connected I'd remove the old harness and tuck the new harness in place in the various clips and clamps.
If you don't have the Assembly Instruction Manual you may want to think about buying one. It will show just how the original was run and where the connections are.... and a zillion other things it will be good to know.
Good Luck!
Regards,
Alan
Last edited by Alan 71; Apr 15, 2012 at 03:44 PM.
Drifting
Joined: Jun 2006
Posts: 1,912
Likes: 12
From: Schaumburg (Chicago) Illinois
Hi d,
The engine harness is a pretty easy one.
If the old one is still in place I'd lay the new one roughly in place and unhook, (old), and then hook, (new), the connectors one at a time.
When they're all connected I'd remove the old harness and tuck the new harness in place in the various clips and clamps.
If you don't have the Assembly Instruction Manual you may want to think about buying one. It will show just how the original was run and where the connections are.... and a zillion other things it will be good to know.
Good Luck!
Regards,
Alan
The engine harness is a pretty easy one.
If the old one is still in place I'd lay the new one roughly in place and unhook, (old), and then hook, (new), the connectors one at a time.
When they're all connected I'd remove the old harness and tuck the new harness in place in the various clips and clamps.
If you don't have the Assembly Instruction Manual you may want to think about buying one. It will show just how the original was run and where the connections are.... and a zillion other things it will be good to know.
Good Luck!
Regards,
Alan
Drifting
Joined: Jun 2006
Posts: 1,912
Likes: 12
From: Schaumburg (Chicago) Illinois
Thread Starter
Heel & Toe
Joined: Mar 2012
Posts: 18
Likes: 0
From: Twentynine Palms CA
Installed the new Lectric Limited harness today. The old harness had a few minor wires that were broken off and I couldn't tell where they came from. Needless to say the car doesn't start so maybe those wires weren't so "minor" as I thought. I got a color coded wiring diagram so I'm going to try and figure out where they are supposed to go. I'll probably purchase the assembly manual or Dr. Rebuild if I can't figure it out.
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Instructor
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i replaced my engine harness with a new one during my restoration and its pretty streight forward. once you lay in the harness its pretty obvious where the wires will connect to. the starter, the horn relay and the firewall connector is where you have to careful. and of course make sure the battery is disconnected before you start.
Team Owner
Joined: Jun 2000
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From: Southbound
Cruise-In II Veteran
Thread Starter
Heel & Toe
Joined: Mar 2012
Posts: 18
Likes: 0
From: Twentynine Palms CA
The first wire is a light brown that splits off the main harness right after the wiper motor. Its about 27 inches long. Any idea where this goes? I believe it goes to the ignition switch but have no idea where the entry hole is located?
Thread Starter
Heel & Toe
Joined: Mar 2012
Posts: 18
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From: Twentynine Palms CA
http://i1170.photobucket.com/albums/...1/IMG_0199.jpg
The next one I can't figure out is a three wire plug, blue, light blue, light brown. It's located on the passenger side about half way between the wiper motor and starter.
The next one I can't figure out is a three wire plug, blue, light blue, light brown. It's located on the passenger side about half way between the wiper motor and starter.
Last edited by droknows; Apr 19, 2012 at 08:57 PM.
Thread Starter
Heel & Toe
Joined: Mar 2012
Posts: 18
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From: Twentynine Palms CA
Burning Brakes
Joined: Jul 2009
Posts: 912
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From: Kansas City MO
Burning Brakes
Joined: Jul 2009
Posts: 912
Likes: 47
From: Kansas City MO
http://i1170.photobucket.com/albums/...1/IMG_0199.jpg
The next one I can't figure out is a three wire plug, blue, light blue, light brown. It's located on the passenger side about half way between the wiper motor and starter.
The next one I can't figure out is a three wire plug, blue, light blue, light brown. It's located on the passenger side about half way between the wiper motor and starter.
Thread Starter
Heel & Toe
Joined: Mar 2012
Posts: 18
Likes: 0
From: Twentynine Palms CA
Thanks for the pics spdrcr29. My stock carburator was shot so I replaced it with an edelbrock carb. It didn't have any of those solenoids attached to the carb or intake manifold as you do. My edelbrock carb has a solenoid with two prongs on the passenger side (enclosed pic). These are the wiring instructions for it, "Black wire (–): To Ground
(Carb Body), Red Wire (+): To Ignition Key Activated 12V Source (NOT coil or alternator)"
So I'm assuming this is not where the three wire clip attaches to?
Last edited by droknows; Apr 21, 2012 at 01:28 PM.
Instructor
Joined: Jul 2022
Posts: 201
Likes: 37
From: White Bear Lake, MN
Ditto on the Doc Rebuild charts. I'm redoing all of my 1971 wiring harnesses and while the charts that came with them from Lectric Limited aren't bad, the Doc Rebuild ones are as close to idiot proof as I believe is possible.
