Engine Wiring Harness Removal
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,241
Likes: 4
From: Okinawa Okinawa
Engine Wiring Harness Removal
I took out the screw that is in the middle of the wiring harness on the driver side engine compartment. I think that is the only thing holding the harness in. I started to pull on it but it didn't move. Don't want to pull too hard without making sure that is the only thing holding it in. Should just come out of the back of the fuse panel, right?
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,241
Likes: 4
From: Okinawa Okinawa
does the entire piece with the engine and forward harness come out as a group or one at a time? I have enot loosened up the sealer yet except around the corners of the entire piece.
Melting Slicks
Joined: May 2009
Posts: 3,079
Likes: 314
2024 C3 of the Year Finalist - Unmodified
Scott
That junction block actually consists of two plugs. One is the engine wiring harness, the other is the forward lamp harness. After unscrewing the bolt, you will need to ply both plugs back at the same time. I believe one plug contains the mount for the other plug, which slides in from the side. The inside of that junction is filled with some goopy dielectic grease. Just make sure you break the seal around the entire perimeter before trying to separate.
Dennis
That junction block actually consists of two plugs. One is the engine wiring harness, the other is the forward lamp harness. After unscrewing the bolt, you will need to ply both plugs back at the same time. I believe one plug contains the mount for the other plug, which slides in from the side. The inside of that junction is filled with some goopy dielectic grease. Just make sure you break the seal around the entire perimeter before trying to separate.
Dennis
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,241
Likes: 4
From: Okinawa Okinawa
Got it out with no problem. Just didn't want to start pulling without knowing what was supposed to happen.
The entire plug (consisting of both harnesses) comes out as one. The engine wiring harness has two small sections that come over the top of the forward harness. The forward harness is the piece where the bolt goes through.
Now I have to decide if I want to replace both harnesses or just the engine. I'd like too since it is out but for another 200 I have to think about it.
Thanks for the help.
The entire plug (consisting of both harnesses) comes out as one. The engine wiring harness has two small sections that come over the top of the forward harness. The forward harness is the piece where the bolt goes through.
Now I have to decide if I want to replace both harnesses or just the engine. I'd like too since it is out but for another 200 I have to think about it.
Thanks for the help.
Melting Slicks
Joined: May 2009
Posts: 3,079
Likes: 314
2024 C3 of the Year Finalist - Unmodified
You are following in my footsteps Scott. I replaced the engine harness when I first got the car. That solved the battery drain problem. Then I replaced the forward lamp harness when I restored the front half of the car...sort of a while I'm at it. The fiber optic pigtail back into the cabin is a real PITA to route under the dash. Old wiring is nothing but one problem after another. Sooner or later it all has to be replaced. Money well spent if you ask me.
Team Owner
Joined: Sep 2006
Posts: 31,221
Likes: 4,310
From: Westminster Maryland
Hi Scott,
I found the engine haness to be in much worse condition than the forward lamp harness on my car.
I think the engine harness deteriorates because it runs behind the engine and down to the starter 2 places where there is a lot of heat and oil mist.
So, if you check out the lighting harness well you might not need to replace it. I ended just taking the old wrap off and putting new wrap on.
Regards,
Alan
I found the engine haness to be in much worse condition than the forward lamp harness on my car.
I think the engine harness deteriorates because it runs behind the engine and down to the starter 2 places where there is a lot of heat and oil mist.
So, if you check out the lighting harness well you might not need to replace it. I ended just taking the old wrap off and putting new wrap on.
Regards,
Alan
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
3rd Gear
Joined: Jul 2013
Posts: 3
Likes: 0