Engine Harness Variations

[XfireZ51]

Considering purchase of extra engine harness. This is from a 90. Does anyone have knowledge of any significant deviations of harness build from one year to the next? If so, could you provide detail or where that can be found?

[-=Jeff=-]

See attached.. I have info 90-93 but I assume 94-95 are the same as 1993

[XfireZ51]

See attached.. I have info 90-93 but I assume 94-95 are the same as 1993


Thx Jeff.

[Ccmano]

Seems to me I read somewhere the harnesses on the very early 90’s was different from the later 90’s. I believe it was only the first few hundred cars.
H
:cheers:

[XfireZ51]

Hans,
The differences can’t be dramatic given the fact that any ECM can be used in any year ZR.

[Corvettes White]

There should be a tag at one end of the harness. It will have the last few digits of the part number, George.

[-=Jeff=-]

For what you are looking to do it won’t matter

[tpepmeie]

Hmmm. and what would that be?[emoji897]


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[XfireZ51]

Todd,

I have an opportunity to pick up an engine harness for my car but from a different MY. Just want to check on compatability before purchasing.

[WVZR-1]

In MY '90 there would have been 2 harnesses, 1 for C60 and the other for C68. A tag near the connector for C100 for C60 would be 0375 likely and C68 0376. There's an obvious visible difference where the C68 would plug into the Blower Control Module or the C60 just a conventional Blower Resistor.

[XfireZ51]

In MY '90 there would have been 2 harnesses, 1 for C60 and the other for C68. A tag near the connector for C100 for C60 would be 0375 likely and C68 0376. There's an obvious visible difference where the C68 would plug into the Blower Control Module or the C60 just a conventional Blower Resistor.

And so a 92 would be using the C68 connector for the Blower Control Module since the 92 did not come w manual A/C controls, correct?
Anything else you can think of? I can think of the knock sensor. ASR?

[WVZR-1]

You need to compare the 'pin-out' to the C100 of your '92 to whatever you have the opportunity to buy.

8A-202-13 gives you that 'pin-out' for your '92.

I didn't bother to compare to '90. It's something you need to sort!!

If the '90 was from a C60 car it would require modifications to be used on any C68 car. Here is the '90 C100 'engine side'. You need to compare cavity population and each circuit mentioned in likely both FSM.

7054

[tpepmeie]

If it’s a c60 car and you pass please let me know. I need a good donor.....

Dom, thought you might have a cool project in mind.... or is it just for spare?


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[WARP TEN]

Considering purchase of extra engine harness. This is from a 90. Does anyone have knowledge of any significant deviations of harness build from one year to the next? If so, could you provide detail or where that can be found?

Dominick, as you might guess Marc Haibeck has a lot of knowledge about this issue. You might check in with him on this if you have not already. --Bob

[grahambehan]

Don't forget the up integration of the knock module from 90=91 MY

[XfireZ51]

Dominick, as you might guess Marc Haibeck has a lot of knowledge about this issue. You might check in with him on this if you have not already. --Bob

Bob,


Good point. Maybe lunch.

Graham,

Yes thank u for chiming in. Knock sensor was definitely on my list.

[Marc Haibeck]

Also... for your '92.
- The valet key wiring changed from two to three wires for '91 and up.
- The oil level sensor connector was added for '91 and up.
- The EVAP solenoid connector was moved from the chassis to under the plenum in '91.

Like Jeff said, none of these things matter to you. You can just add a 645 ohm resistor to the ECM connector to simulate the Valet key as always in full power mode and avoid the valet wiring error code.

[XfireZ51]

Also... for your '92.
- The valet key wiring changed from two to three wires for '91 and up.
- The oil level sensor connector was added for '91 and up.
- The EVAP solenoid connector was moved from the chassis to under the plenum in '91.

Like Jeff said, none of these things matter to you. You can just add a 645 ohm resistor to the ECM connector to simulate the Valet key as always in full power mode and avoid the valet wiring error code.

I owe u lunch Marc.

[WARP TEN]

I owe u lunch Marc.

Hey--How about me too! :cheers: --Bob

[XfireZ51]

Hey--How about me too! :cheers: --Bob

U drive a C7Z06, so u obviously have enough money to buy your own lunch.

[-=Jeff=-]

U drive a C7Z06, so u obviously have enough money to buy your own lunch.

Maybe not.. he might have had enough BEFORE he bought it.. :mrgreen: