rev counter issue

August 25, 2025, 04:55:53 PM

Right people, since solving my last wiring issue. ive now picked up a whole new one, just for fun

My rev counter has stopped working, initially i thought i was going to get lucky as a wire had fallen of the coil. The car also failed to run. i came back to the car today. Started an idled lovely this time, though i started it with the blue plug detached, not sure why but just did. now plugged in still fine, but the whole thing ran like a dog midweek, failed to even run when i tried Friday. but since ok

But during this time, the rev counter is failing to work, the wire to pin KL1 on the white plug seems to work just fine. Also volt testing it while running i get voltage drop on the multi meter, which is the opposite of how i thought it would work, but it shows power is there. Now when i do a continuity test from the pin to the other end of the track on board i get nothing, i assume this is my issue.

But there is no sign of any damage, and it worked when i had the wiring issue previous to this

So what are your thoughts please

Re: rev counter issue

Reply #1 – August 26, 2025, 10:22:44 AM

Based off your other post, you're in a CE1 car.
Not sure what you're referring to when you say KL1.

But I'd test continuity between B19 and the coil.
If there is a failure there, test between D26 and the coil.
That way you can see if there is a failure between the fusebox and the coil, or the fusebox internally.
If you have continuity between B19 and the coil, the chances it are it's your clocks internally (which is where you may already be looking).
It's odd how you say you have voltage and it drops, I used to think it spiked (quite high) to give an RPM signal.