85 300TD: Module that delivers 3V to instrument cluster?

[garybeck]

My fuel gauge and temperature gauge are going nuts. Flapping all over the place.

I've been told that both of these units run on 3V that is delivered to them by a module that is located somewhere behind the instrument panel. It logically follows that the module is failing, since both gauges are failing together.

Does anyone know if a 300TD (wagon) has such a module, and if so where it is, how to get it out, and find a replacement?

Thanks
Gary

[pawoSD]

Nope, they run on 12V like everything else.

Your problem is likely a poor ground connection between the cluster and the chassis of the car. Add an extra general ground to the cluster and the issues will likely go away.

[garybeck]

Originally Posted by pawoSD

Nope, they run on 12V like everything else.

Your problem is likely a poor ground connection between the cluster and the chassis of the car. Add an extra general ground to the cluster and the issues will likely go away.

sounds like a plan. thanks for saving me the trouble of looking for a module that doesn't exist ! I'll try to make a new ground for it.