The rpm gauge on my 84 190d will not work. 84 and above do not have a tach amp so I can't do that quick easy fix. I made the assumption it was a bad RPM sensor so I replaced it. The rpm gauge still does not register. I don't know where all the sensor wires go once they go to a relay station behind the battery. The only relays there are the kickdown switch and something else I forget at the moment. I suppose the rpm gauge could be bad. Is there any way to troubleshoot it? The car has 308,000 miles and that is pretty much the only thing wrong with it.
- posted
20 years ago