LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Opti wiring harness?

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Old Jun 1, 2009 | 10:30 AM
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Default Opti wiring harness?

Just wondering if a wiring harness on a 94 obd1 is different than a 96 obd2.
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Old Jun 1, 2009 | 04:05 PM
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Yep, it sure is, but the OBD type has nothing to do with it. 93-94 optis (non-vented) use one harness, 95-97 optis (vented) use another.
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Old Jun 1, 2009 | 04:50 PM
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Thanks for the information. I had to replace my opti i had a msd. Went with a oem opti with msd cap and rotor. I didn't have the stock wiring harness so i put one off a 94 on there and its just crankin but wont start.
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Old Jun 1, 2009 | 04:59 PM
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Originally Posted by Murdered96TA
Thanks for the information. I had to replace my opti i had a msd. Went with a oem opti with msd cap and rotor. I didn't have the stock wiring harness so i put one off a 94 on there and its just crankin but wont start.
An early harness has a short plug at the opti end. The later harness is long there. An early harness will never make contact with the opti pins on the vented model.
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Old Jun 1, 2009 | 05:02 PM
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Oh, okay. Does that sound like that is the problem then? Where can you pick one up at?
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Old Jun 1, 2009 | 06:05 PM
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That is definately the problem.

I have a brand new harness id be willing to sell for 20+ shipping. Its a Vented opti harness.
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Old Jun 1, 2009 | 11:01 PM
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pm sent
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Old Jun 2, 2009 | 01:30 AM
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if you dont get it from him i bought mine from i think a sponsor... if not someone can fix it... but it was from www.eficonnection.com
they have all sorts of harnesses and plugs on there
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Old Jun 2, 2009 | 10:29 AM
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Thanks for the information
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