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which tach wire is which

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Old 02-07-2008, 02:38 PM
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Car: 87 firebird none soon
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Axle/Gears: 2.73 10 bolt
which tach wire is which

I got this tach free from a friend that was at a rally and some kid freaked out on the tach for some reason and asked if any one had wire cutters my friend happened to be the closest one with a leatherman. I did figure this out at one point and I understand that they are power, ground, illumination and signal, i don't understand where to get a dampener and where to tap for the signal. here is a pic
Old 02-07-2008, 03:23 PM
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Car: 1991 transam
Engine: 305 30 over long tubes into 3" y
Transmission: 700r4
Axle/Gears: 4:10
Re: which tach wire is which

red=hot (in fuse box) black= ground(to metal frame) yellow= hot for tach light(fuse box to fuse thats hot only when ign. switch is on) green= tach side on dizzy,hth jimmy
Old 02-07-2008, 06:55 PM
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Car: 87 firebird none soon
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Axle/Gears: 2.73 10 bolt
Re: which tach wire is which

well yes and no. i knew where to get power and ground and illumination, didn't know which was which though. where on the dizzy? where to get a dampener so that the needle doesn't jump all over the place.

thanks jimmy!
Old 02-08-2008, 08:45 AM
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Car: 1991 transam
Engine: 305 30 over long tubes into 3" y
Transmission: 700r4
Axle/Gears: 4:10
Re: which tach wire is which

there are 4 wires going to the coil mine are pink and white the back two go into a wire loom, theres a connector ,gray with white wire this should be where you hook into.later jimmy
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