dead rev gauge, help!

[M155-E30]

hiya

everything else is working but rev counter is dead, any ideas? where does it read from?

cheers

[Bob_S]

i found out that my dials were fudged so got some new clocks and switched over my speedo so i had the correct mileage.

p.s fast and furious then slow and methodical when it goes wrong lol

[Brianmoooore]

Poor connection on pin 9 (black wire) of the big C101 plug and socket (on bulkhead next to the fusebox) can cause this.