1987 Oldsmobile Cutlass/442/F85 NEW DIXCO STYLE HOOD TACH - 8000 RPM

NEW DIXCO STYLE HOOD TACH - 8000 RPM. TACHOMETERS HAVE ELECTRONIC MOVEMENT. THEY WILL RESET TO “0” ONCE THEY RECEIVE 12 VOLTS POWER. WORKS WITH POINTS STYLE IGNITION AND GM HEI. ANY AFTERMARKET IGNITION MAY NEED A MODULE OR CONVERTOR TO GIVE CORRECT SIGNAL.

The red wire is to positive

The black wire is to ground

The green wire is to the tach

TACHOMETERS WILL WORK WITH FACTORY GM POINTS OR FACTORY HEI IGNITION.

WHEN USING AN AFTERMARKET IGNITION SYSTEM LIKES MSD, ACCEL, PATRONIX, ECT.

A LOT OF THESE SYSTEMS GENERATES HIGHER OUTPUT VOLTAGE TO THE TACH LEAD THAN WHAT A FACTORY GM TACH CAN HANDLE.

FACTORY GM TACHS CAN OPERATE ON VOLTAGE RANGING FROM 11.2 TO 14.7

MOST AFTERMARKET IGNITION SYSTEMS GENERATE OVER 18 VOLTS.

YOU WILL NEED TO BUY FROM THE MANUFACTURE OF YOUR IGNITION SYSTEM AN ADAPTER TO LOWER THE VOLTAGE TO THE GM FACTORY VOLTAGE.