5 replies to this topic

[91COOPER5]

Can anyone tell me what would cause the rev counter needle to bounce around and read eratically. It seems to read ok at high revs but will bounce around for a bit when the revs drop.

[Big_Adam]

Bad coil connection. Check if coil connectors are loose.

If they are just nip them up with some grips. Then put them back on the coil.

[stickycreambun]

or maybe bad connection on the tacho, though more likey to be the coil.

[91COOPER5]

Checked both connections. Both are good. I lost the Taco completly this morning, also lost the heater. I'm going to go over the wiring as best as I can tonight. I'd guess the heater has stopped working due to a blown fuse.

[Wil_h]

Could be the voltage regulator on the back of the dash. but also therse rev counters are not the most relaiable and I have seen many fail in this manner.

[91COOPER5]

Ok, got the tacho and heater working. Replaced all the fuses for new ones. Think I'll look at replacing the fusebox with a new blade Fuse Box.

If it was the tacho that was faulty why would it be getting affected by the stereo or any other electrical equipment.

I'll have a look at getting a new voltage regulator. How is the tacho earthed and where abouts is it so i can check the earth is ok. is it possible to run a wire directly from the coil to the tacho so that I can verify whether the harness cable is getting interference somewhere.