LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What harness is this?

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Old 05-05-2007, 04:41 PM
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What harness is this?

I installed my long tubes and this one's kinda close to one of the primaries down farther in the engine compartment. I'm just curious as to what is running on this harness. Red arrows point to the harness in question. Thanks guys!


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Old 05-05-2007, 05:15 PM
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RH O2 sensors, starter solenoid, PCM ground and knock sensor.
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Old 05-05-2007, 06:52 PM
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Thanks Rob. I unplugged everything and wrapped the harness with a spark plug wire insulator that I had. I'm thinking it will be safe now. I didn't burn through any wires yet, but the wireloom was melted so it would have only been a matter of time before I charred some wires.
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Old 05-05-2007, 09:03 PM
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Originally Posted by shock6906
Thanks Rob. I unplugged everything and wrapped the harness with a spark plug wire insulator that I had. I'm thinking it will be safe now. I didn't burn through any wires yet, but the wireloom was melted so it would have only been a matter of time before I charred some wires.
Do you have Hooker LT's or LT's in general? Best thing to do is relocate that harness. You must lift it out of its current location and route it between primaries 2 and 4 through the motor mount bracket and route the connections to their respective destinations. Very easy to do. If those are LT's then that spark plug boot won't last for anything. Especially if it's making contact with one of the primaries.
Trust me... relocate that harness or you'll have more problems down the road.

P.S. That harness also has your crank position sensor connector

Last edited by SS RRR; 05-05-2007 at 09:06 PM.
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Old 05-05-2007, 10:53 PM
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They're Hooker Jet-Hot LT's. I'll take a look in there tomorrow and see if it needs relocating or not. Thanks for the advice.

By the way, it's insulators something like these:

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Old 05-06-2007, 01:22 AM
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i burnt that bad boy up on my 95Z that had mac mids. kept throwing a knock sensor code but started fine. only got one wire.

Originally Posted by SS RRR
P.S. That harness also has your crank position sensor connector
no it doesnt. the crank sensor is on the front of the motor on the bottom of the timing cover.
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Old 05-06-2007, 05:38 AM
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Originally Posted by shock6906
They're Hooker Jet-Hot LT's. I'll take a look in there tomorrow and see if it needs relocating or not. Thanks for the advice.

By the way, it's insulators something like these:
Even something as snazzy as those may not do the job. If those things are touching the primaries in any way you'll still end up with burnt wires. I'm telling you.. it's real easy to just disconnect everything and relocate it. I'll send you a pic of where to relocate it to in a sec.
EDIT
Here you go:

Stab the harness through the motor mount bracket from the top. There is plenty of space between the two motor mount brackets to route your connections and it is beyond far and away from the heat of the primaries or collector. You zip tie the harness to the A/C line you see in the pic and you're golden. Just a suggestion.




Originally Posted by NoRiceInside
no it doesnt. the crank sensor is on the front of the motor on the bottom of the timing cover.
Okay... so it's at the front of the motor. Do you think it originates there or something? Trace the wires back...
EDIT
Here you go:


Looks like the PCM ground, starter solenoid, pass. rear 02, pass front 02, CPS and knock sensor connectors to me...

Last edited by SS RRR; 05-06-2007 at 06:39 AM.
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