I'm in need of a complete, intact, engine wiring harness for a 1988 Fiero with a V6 and 5-speed manual getrag transmission. The connectors especially need to be in good condition.

Please let me know what you have with condition, possibly picture(s) and what price you need shipped to Michigan. Thanks~

[This message has been edited by TakeTwo (edited 03-11-2023).]

Bump - I guess I would consider an 87 V6 5 speed harness as well?

No idea whether it's identical to the 88 harness. I tried to get one from a parts yard and it was destroyed.

quote Originally posted by TakeTwo: Bump - I guess I would consider an 87 V6 5 speed harness as well? No idea whether it's identical to the 88 harness. I tried to get one from a parts yard and it was destroyed.

The 88 harness uses a different oil sender plug. I was stock piling harnesses for swaps, so I might have a manual harness or two. I can look in my shed when I have a chance, but it is cold here and I will be gone over the weekend. Where are you in MI?

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-Brian

My 87 GT Poly Suspension Upgrade (all pics) thread
Removing the roof panel
My HUD install thread
Modified stock air canister and base to 3.5 inch for 3800na

Im pretty sure I have an 88 2.8 manual wire harness in good shape. PM me if you still need one

PM's sent

Still looking~

Anyone know if an '85 -87' V6 manual harness will suffice and or what would need to be changed/modified to work on an '88 properly?

[This message has been edited by TakeTwo (edited 04-07-2023).]

TTT

Bump

Bump, tried to pull a couple at two parts yards and someone had demolished the harnesses..

Still in need..

The only difference between the 86-88 auto Harnesses would be one connector for the oil pressure sensor and one for the TC lockup function. The stick harness would have only one different connector . Problem easily solved by using the 88 oil pressure sender. The ECM's are identical except for the chip. On the auto the TC lockup function is included and one the stick the shift light function is included. Easily solved by plugging in the stick or auto chip.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

quote Originally posted by MulletproofMonk: The 88 harness uses a different oil sender plug.

It also uses different connections at the alternator.
Also be aware that some of the 88 harnesses had a revised connector for the injector harness. Most of them have the same flat connector that the earlier harnesses used, but a few of them used a more square connector.

Automatic harnesses are quite different from the manual harness. In addition to the torque converter lockup wiring, the auto harness also has the connector for the gear selector, which incorporates the reverse lights and the P/N switch. The heavy starter wire also appears in a different place in the C500.

[This message has been edited by Raydar (edited 07-16-2023).]

I can help you out.

Contact me via PM.

I'm here in Michigan.