Faulty Temperature Gauge

[@nicholaslamari3848]

Another great video inspector - I've been dealing with this suspect for quite some time! It seems like you have another gauge breaking the law here too - your tachometer seems to be reading low. I have a similar issue sometimes, and I used to have a low idle. Seems like both of our cars are Regina cars too. I hope you can catch this one too and save me the trouble! For reference, I also had a low idle issue which I couldn't fix until I replaced the fuel ecu on the right side of the car - it was driving me crazy

[@robertdeptula2003]

Thanks. I gave up on the tachometer. Temp gauge is critical. By the way, to prevent overheating I added a low coolant warning lamp to the dash. There is another video on my channel about the installation.

[@nicholaslamari3848]

​@@robertdeptula2003I did see that video too, very helpful - it's on my long list of future upgrades. In regards to the tachometer, someone recommended that it could be either a capacitor in the tachometer slowly going bad, or a bad connection at the ignition coil, with the red and white wires. I haven't had the time to investigate this further though unfortunately. I may attempt to swap over another tachometer and see if the issue stops, but it will be hard to tell since it only happens every now and then for me.

[@robertdeptula2003]

Thanks for the info, I will look into it. Maybe future video...

[@dimaperepadiya3785]

❤

[@jonathancano.167]

Robert I might need your help on this one. I too was wondering why my temperature gauge wasn’t working and in the process of trying to figure it out I lost power to all my gauges check fuses, but none of them seem to be out. I learned a lot just watching this one single video, but was wondering is there a hidden fuse or relay or something in between that would cause no power to any of the cluster gauges. If you could make a video or help me out, I’ll be more than thankful I have liked and subscribed.

[@robertdeptula2003]

What is the year and model of your car?

[@jonathancano.167]

@ I have a 1990 Volvo 740 wagon

[@robertdeptula2003]

You will need an electrical diagram to trace the problem. I don't have one for this year and model. Do you have voltage at the connector which plugs into the instrument cluster?