Temp Gauge stuck on high

[grahamsy2k]

Recently bought a new e30 and the temp gauge is stuck on full. Without the car even running it jumps all the way and won’t come down. I made sure the nut on the back was tighten. Any other ideas?

Not sure if it makes a difference but I recently took out the cluster to change the odometer gears. And tbh I can’t remember if it worked before or not. Kinda leaning towards it was working because I’d it wasn’t I probably would have noticed it.

[e30davie]

if its stuck on high it means the wire that is supposed to attach to the temp sender is connected straight to ground.

so id be looking at the temp sender itself, check its resistance, dont just replace it....

and if it checks out you'll have to start tracing the wire to see where its touching ground.

[grahamsy2k]

if its stuck on high it means the wire that is supposed to attach to the temp sender is connected straight to ground.

so id be looking at the temp sender itself, check its resistance, dont just replace it....

and if it checks out you'll have to start tracing the wire to see where its touching ground.

And I am looking for the brown one correct?

[ButtJuice]

Brown would be the ground.

[Jean]

It can also be an issue in the cluster itself , if one of the 3 pins on the temp gauge itself aren’t making a contact with pcb.