temp and fuel guage help

[hockeylad72]

ok may car is at it again, get something fixed and something else goes wrong.

temp guage does not move and fuel level guage reads ok for about 3 - 4 mins after stating then reads zero. all other functions like rev counter, speedo, mfa and all lights work any ideas to what is causing this??


HELP me please

cheers

[hockeylad72]

forgot to mention my car is
Golf GTI 8v 1988 pb engine if that makes any difference

cheers again

[monzablue16v]

Check your connections where you have been fixing stuff may have knocked a wire off check fuses etc might be more but try the simple things 3 times first!! 

[diagnosis-dub]

Might be the voltage regulator on the back of the speedo cluster gone funny.

[rubjonny]

Check the earth lead from the rocker cover to the coil bracket is in place, check all the bolts on the rear of the cluster are done up tight as these supply the electrical connection to the gauges. As diagnosis-dub says check the voltage stabiliser:

To test the voltage stabiliser, connect a voltmeter between the terminals shown (see illustration) with a 12 volt supply to the remaining terminal. A constant voltage of 10 volts must be registered. If the voltage is above 10.5 volts or below 9.5 volts renew the voltage stabiliser.

[Gambit]

check all the bolts on the rear of the cluster are done up tight as these supply the electrical connection to the gauges

you reckon this might be the cause of my intermittent temp gauge?? works sometimes but not other times? sender & wiring is fine from engine to bulkhead

[rubjonny]

Could well be, or it could just be knackered clocks. Especially if they are motormeter, not as good as VDO manufactured ones!

[Gambit]

aye they are motometer jobbies. but cant be arsed changing them as everything else works perfectly on them - ill just stick to using the oil temp!

[hockeylad72]

Yep mine are motometer too, just ordered secondhand instrument cluster. Its a pain in the butt to having to guess if I've got enough fuel to get to work and back home again each day. Cheers for you help again guys