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Old 02-16-2018   #1
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
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Default Engine Harness Variations

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?
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Old 02-16-2018   #2
-=Jeff=-
 
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Default Re: Engine Harness Variations

See attached.. I have info 90-93 but I assume 94-95 are the same as 1993
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File Type: xls LT5-ECM-wiring.xls (46.5 KB, 25 views)
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Shelby Series 1 - Wilwood Brakes
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Old 02-16-2018   #3
XfireZ51
 
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Default Re: Engine Harness Variations

Quote:
Originally Posted by -=Jeff=- View Post
See attached.. I have info 90-93 but I assume 94-95 are the same as 1993

Thx Jeff.
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Old 02-16-2018   #4
Ccmano
 
Join Date: Jun 2006
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Default Re: Engine Harness Variations

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.
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Old 02-16-2018   #5
XfireZ51
 
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Default Re: Engine Harness Variations

Hans,
The differences can’t be dramatic given the fact that any ECM can be used in any year ZR.
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Old 02-16-2018   #6
Corvettes White
 
Join Date: Dec 2003
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Default Re: Engine Harness Variations

There should be a tag at one end of the harness. It will have the last few digits of the part number, George.
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Old 02-16-2018   #7
-=Jeff=-
 
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Default Re: Engine Harness Variations

For what you are looking to do it won’t matter
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Shelby Series 1 - Wilwood Brakes
Custom Interior
NCM Lifetime Member #978
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Old 02-16-2018   #8
tpepmeie
 
Join Date: Aug 2005
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Default Re: Engine Harness Variations

Hmmm. and what would that be?[emoji897]


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Old 02-16-2018   #9
XfireZ51
 
Join Date: May 2007
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Default Re: Engine Harness Variations

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.
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Old 02-17-2018   #10
WVZR-1
 
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Default Re: Engine Harness Variations

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.
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