7 replies to this topic

[pig on the wing]

I had to install wiring for stereo and ciggy lighter today. All went ok until I noticed the Rev counters stopped working. I know it was working earlier as it jumps a little when the key is turned to electrics. Now I did do some unplugging and plugging of the fuse box trying to locate a continuous live and ignition live, but all the fuses are fine
There is power on the green/orange cable connected to the dial. The heater works, I've moved the fuses bit nothing....the light has also stopped. The other dials are fine, is the a fuse on the counter itself or is it fried from all the messing about dya think?
Ta....

[ToM 2012]

hi have you checked the earth on it? as if this has been messed with or moved slightley this can stop it from working.. if its earthed and there is power going to it and it still doesn't work then its no good.. 

[pig on the wing]

Where is its earth, when I reach around the back there is the green and orange live and a thin brown and white cable

[Stiggytoo]

Brown is usually an earthish colour, depending on who wired it and what they had available to them. Are you sure all the wires are connected?

Was that a brown and white wire, or brown wire and separate white wire?

[pig on the wing]

i think that the white brown was the signal cable as it had a bullet connecter type thing. looking in Haynes the cluster has one earth near the speedo

[dklawson]

White/brown (white with a brown stripe) is for the oil pressure warning light (when fitted).  In Lucas wiring schemes, brown (solid brown with no other color) is for unswitched, non-fused, 12V continuously live wires.  White wires are switched, non-fused 12V live wires (only on when the key is in the run position).  Earth wires are typically black both in Lucas color codes and most aftermarket electrical/electronics.

 

If your tach does not work and its internal light does not work, do look for a missing earth connection as suggested above.

[pig on the wing]

I never checked the coil connection,,,,will look tmw..Wiring diagram has no earth for the tacho I think its done through the multi connector

Thanks

[pig on the wing]

It was the coil connection. I took it off thinking I'd use that as the constant live and didn't put it back...Doh!!!! Bulb must be blown so another job for the list....
Thanks for your help