##!! tach is doing it to me again.

[admanles]

Okay, so tried the "filter" trick, then did a more permanent solution, by taking the sending unit apart and looking for any cold solder joints or loose connections, found none, but touched up some areas anyways and checked for cracks in the circuit. Determined that it was not making a good connection because the pins were loose, so was able to tighten everything up with some black silicone windshield adheasive... Worked great, problem solved.... for two 1/2 weeks. Now my tach is working when it feels like it....kind of like my son keeping his room clean... then today my tach was jumping all over the place to the sound of a relay? coming from the far right glovebox area.... decided to work for 10 minutes, now it's on break. I give up... anyone have an idea what's going on? Out of curosity how many model years were affected with the tach problems? Mine is the '80 300sd.

Thanks in advance!

Les