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slipbakka · 07-04-2007, 07:13 PM

Hello i just install a new aftermarket tach gauge and voltmeter in my 1987 2 door cutlass supreme with a 3.8L V-6 motor.The problem is i hook the tach just like the manual told me hooking the green wire to the negtive side of the distributer.but the tach needle doesn't go pass 2000rpms even when i raise the engine up the needle doent move just stay's a 0 rpms. the tach gauge is a racing summit tach gauge with 0 to 11,000 rpm.also the voltmeter works fine but when i turn on the turn blinkers the volt meter needle bounce up and down with the blinkers.and when i turn the a/c ,radio and headlights on the meter drops from 14 volts to 10 volts.can someone help me im confused?

07-04-2007, 07:13 PM	#1 (permalink)
slipbakka Junior Member Join Date: Mar 2007 Posts: 9	aftermarket tach gauge and voltmeter Hello i just install a new aftermarket tach gauge and voltmeter in my 1987 2 door cutlass supreme with a 3.8L V-6 motor.The problem is i hook the tach just like the manual told me hooking the green wire to the negtive side of the distributer.but the tach needle doesn't go pass 2000rpms even when i raise the engine up the needle doent move just stay's a 0 rpms. the tach gauge is a racing summit tach gauge with 0 to 11,000 rpm.also the voltmeter works fine but when i turn on the turn blinkers the volt meter needle bounce up and down with the blinkers.and when i turn the a/c ,radio and headlights on the meter drops from 14 volts to 10 volts.can someone help me im confused?