imported post
There are only two wires (not counting the bulb) on the tachometer. One (yellow/blue) wire connects to the engine control module (ECM). The other (green) wire connects to ground.
The possibilities are:
1. Loose/dirty/corroded connections at the tachometer
unit, at the ground point or at the ECM.
2. Faulty tachometer unit.
3. Faulty signal coming from the ECM.
That's about it..........
There are only two wires (not counting the bulb) on the tachometer. One (yellow/blue) wire connects to the engine control module (ECM). The other (green) wire connects to ground.
The possibilities are:
1. Loose/dirty/corroded connections at the tachometer
unit, at the ground point or at the ECM.
2. Faulty tachometer unit.
3. Faulty signal coming from the ECM.
That's about it..........