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Help ICM location 87 trans am

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Old 09-12-2020, 02:46 PM
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Help ICM location 87 trans am

i swapped my ls motor into my 87 trans am that i bought a couple years ago, and i’m trying to install this aftermarket tachometer and wondering where should i run the wires ? all help is appreciated! thanks in advanced
pfa



Old 09-12-2020, 04:20 PM
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Re: Help ICM location 87 trans am

Look at the ignition coil. You'll notice 2 connectors, each with a pink wire and a white one.

White is the tach. Pink is power to the ignition.

You can pick up the tach signal from either white wire; probably makes better sense to splice into the one that goes toward the car, not the one that goes toward the dist.
Old 10-08-2020, 08:53 AM
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Re: Help ICM location 87 trans am

Originally Posted by sofakingdom
Look at the ignition coil. You'll notice 2 connectors, each with a pink wire and a white one.

White is the tach. Pink is power to the ignition.

You can pick up the tach signal from either white wire; probably makes better sense to splice into the one that goes toward the car, not the one that goes toward the dist.
Thanks for the info, sorry i’m so late!
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