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TBI to TPI Swap - Harness Issue..HELP

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Old 08-20-2008, 02:57 PM
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Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
TBI to TPI Swap - Harness Issue..HELP

I'm swapping in a 305 TPI into my 89 Camaro. The 305 TBI harness (from the old motor) is currently in the car. I have the 305 TPI harness waiting to go in once the old harness is removed.

My problem is the the TPI harness doesn't seem to have the any of the wiring that goes to the front headlights. On the old TBI harness, wiring comes from the main harness on the drivers side, down past the charcoal canister to the driver headlights and then across the front of the car and plugs into the pass side headlights. This looks like one piece (it doesn't look like it plugs into the main harness running across the top of the car).

The TPI harness doesn't have any of this!! How do I plug in the lights on the TPI harness?? What am I missing?

THANKS.......................
Old 08-20-2008, 04:40 PM
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Car: 90 Formula
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Re: TBI to TPI Swap - Harness Issue..HELP

There are actually 2 harnesses under the hood, one for the engine and the other has everything else. I ran into this when I swapped TPI on to my Formula.
Old 08-20-2008, 10:02 PM
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Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Re: TBI to TPI Swap - Harness Issue..HELP

Originally Posted by Mongoose
There are actually 2 harnesses under the hood, one for the engine and the other has everything else. I ran into this when I swapped TPI on to my Formula.
Are the two harnesses connected to each other? If so, where ?

Do you have any pics of the swap?

THANKS..........
Old 08-21-2008, 08:00 AM
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Car: 90 Formula
Engine: 305
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Re: TBI to TPI Swap - Harness Issue..HELP

They both plug into a bulkhead style connector on the drivers side below and to the right of the brake booster (as viewed from the front of the car). Should be a metric bolt holding the plugs into the socket. I've got some but they're too large to post here, I could email them to you if you like.
Old 08-21-2008, 11:38 AM
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Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Re: TBI to TPI Swap - Harness Issue..HELP

Originally Posted by Mongoose
They both plug into a bulkhead style connector on the drivers side below and to the right of the brake booster (as viewed from the front of the car). Should be a metric bolt holding the plugs into the socket. I've got some but they're too large to post here, I could email them to you if you like.
Yes, if you could that would be great.

Thanks...I really appreciate it

Bill
billcarter@sympatico.ca
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