Tachometer Problem

[1quickneon]

Whats up.,
I have an autometer tachometer and i tried to hook it up but had some problems. I hooked the green wire to the blue and grey tach wire in the cluster. The red went to the radio fuse and i tried the back up lights fuse. The white went to the fog lights fuse and the black i hooked to the battery. i had power and the tach would repsond to the rpms but then the needle would go right to 7 grand and wouldnt stay at zero. Then after that i started blowing fuses that i had the red wire hooked up to can anyone help me or does anybody know why its doing that? do i have the wires hooked up wrong? Any help will be appreciated Thankss alot

[das2123]

If you are hooking up an aftermarket tach, you need to cut the tach wire going to the cluster.

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