Aftermarket Tach on '87

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10-20-2009, 10:18 AM

red_motofox

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Aftermarket Tach on '87

I'm trying to wire an aftermarket tach into my '87 D100 5.2L and I'm not sure where to get my signal from. I have a Haynes manual, but short of reading through every wiring diagram...?

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10-20-2009, 11:04 AM

aaron7

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Same question for me too, though I have a 3.9 and an 88!

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10-20-2009, 03:11 PM

charlie1935

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Negative side of the coil if memory serves me right.

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