Mk3 Speedo Clockset Fault. Everything Stops Working When Engine Is Running.

[A8vgti]

Ive got a Mk3 GTi 1996 AGG. It occasionally has a fault when everything on the clockset stops working when the engine is started. Speedo and rev counter dont move and both LCD displays go blank. Im 99% sure the fault is with the wiring of the car rather than the clockset. I did do a search but couldnt find any posts relating to this problem. Has anyone had this fault?


Thanks Jamie

[Len]

Probably in the ignition switch then.
But worth taking the clocks out to check

[A8vgti]

Probably in the ignition switch then.
But worth taking the clocks out to check

Really? You think. I have had the clocks out. Checked all wiring behind and around clockset Made sure everything was secure. Fitted it all back again and it worked. Bit annoying really, I hate intermittant faults! Its done it twice now.

[Malz0r]

Sounds like an earth to me my gti did the same!

[A8vgti]

Sounds like an earth to me my gti did the same!

Did you cure your fault? What did it turn out to be?

Thanks Jamie

[Len]

I doubt very much that the clocks have their own seperate earth!

[rubjonny]

well you would be wrong
the dash earths to the engine block somewhere, its one of the brown/white wires. rear corner passenger side on 16v, on 8v its on the front near driver side i think

[Len]

Ah right! But I always assume that earths go to the body/chassis, didnt know there was any earths to the engine!  :embarassed:
Oh well, also what's this about a dash sensor?? 

[rubjonny]

yeah there are a couple earth wires to the head on the 16v, as well as the dash earth the ecu sensors all earth there too. take a look next time you under the bonnet, its in the far corner near the metal pipe. couple o ring terminals with brown/white and brown wires

dash sesnor? maybe mean dash temp sensor, which is the small black one on the side of the head with a red/yel wire on a 16v, nothing to do with op problem tho

[Len]

OK was reading stuff in another thread was all.