C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1992 optispark wire loom question

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Old May 5, 2013 | 08:34 PM
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Default 1992 optispark wire loom question

We are deep into replacing the water pump and decided to take care of the optispark while we were at it. In spite of having a corroded harmonic balancer and crank pulley (very fun), we have finally replaced the optispark to come across another problem... The loom for the new optispark and old one are different. The old has a 5 pin config with one wire solid and 3/4 of the loom is wrapped in foil. Finally getting to the question, can anyone tell us what this is about?
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Old May 5, 2013 | 09:35 PM
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thanks for the link, I had looked at that hoping for insight, the loom portion that i am worried about plugs into the optispark (this connection is VERY corroded) and plugs into a five plug connector. It comes out of the opti as a 4 then has a five plug at the other end, one of the "wires" is a solid wire with insulation until it goes into the electrical tape wire loom, where it is wrapped in foil with a gold outer and silver inner. We are guessing this is to suppress radio noise, I have photos and will email you here in the next couple of minutes, thanks for your input!
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Old May 5, 2013 | 09:42 PM
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photos sent...
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Old May 5, 2013 | 09:53 PM
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nope just got failure notice, have recut and repasted
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Old May 5, 2013 | 09:54 PM
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just got 2nd failure notice, will try to figure out how to load photos here...
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Old May 5, 2013 | 09:56 PM
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The 1992 opti used a different wire harness jumper than 1993-94. Sounds like you recieved the 93-94 unit, not sure if the 92 is still available. Do a search on the conversion needed to use what you've got.
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Old May 5, 2013 | 09:59 PM
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just got 2nd failure notice, I'll try to post in forum
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Old May 5, 2013 | 10:04 PM
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sounds like a plan, it seems like this is a 92 only type of thing, but can't find the solid wire in any of the workshop manuals we have, would love to know if it needs to be kept to make computer happy, also why the foil?
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Old May 5, 2013 | 10:17 PM
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I had to reuse my old harness, couldn't find a new one for a 92.
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Old May 5, 2013 | 10:22 PM
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I don't recall any foil, I'll have to go take another look at it.
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Old May 5, 2013 | 10:30 PM
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it looks like we will clean up the old one and reuse as well. Did you have the 6 pin connector with 5 pins used that it screwed to the passenger side manifold under the fuel rail?
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Old May 5, 2013 | 10:39 PM
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no the foil is wrapped under the most likely original 92 harness that had electrical tape type wrap, also has a solid wire that connects to the 6 pin connector that has 5 pins used; the solid wire terminates under the electrical wire wrap... am uploading photos to photobucket now, will post as they become available
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Old May 5, 2013 | 10:39 PM
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also great photo
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Old May 5, 2013 | 10:45 PM
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Here's an adapter.

http://www.eficonnection.com/eficonn...px?ItemId=1032
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Old May 5, 2013 | 11:33 PM
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Originally Posted by STL94LT1
Cool
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Old May 5, 2013 | 11:48 PM
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am trying to add photos of harness with space foil, hopefully this works!
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Old May 6, 2013 | 12:13 AM
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would love to, but can't seem to get your email address to work, if I pm you, would you email me?
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