SteveHall64Healey
Jedi Trainee
Offline
My tachometer is working intermittently. It always works at startup, including the first few miles of fully warmed-up driving, but jumps between zero and the current engine speed periodically as I drive. The engine speed indicated when it is working is consistent with throttle position, i.e. when it works it seems to be correct.
Here’s what I’ve done to diagnose. Before I commit to the expense of having the gauge repaired, I would welcome any fresh ideas on the problem:
- examined all wiring under the hood for any loose or damaged electrical connections: all good and all other electrics working normally.
- tested resistance of wire from coil to tachometer and the resistance of that wire to ground with tach disconnected: zero ohms resistance on the length of wire running from coil to tach and infinite resistance from that wire to ground.
- tested resistance between screw posts on tach and ground: zero ohms.
thanks
Steve
Here’s what I’ve done to diagnose. Before I commit to the expense of having the gauge repaired, I would welcome any fresh ideas on the problem:
- examined all wiring under the hood for any loose or damaged electrical connections: all good and all other electrics working normally.
- tested resistance of wire from coil to tachometer and the resistance of that wire to ground with tach disconnected: zero ohms resistance on the length of wire running from coil to tach and infinite resistance from that wire to ground.
- tested resistance between screw posts on tach and ground: zero ohms.
thanks
Steve