temp gauge

Hi just a quicky my temp gauge on my mk1 gti is playin up my red light flashes when i start up which is normal but after a few minutes the gauge just goes off when it gets to a certain temp   any ideas cheers

Hi Pepsi,

What do you mean "the gauge just goes off when it gets to a certain temp" - do you mean the red light stops flashing or the needle indicating the temperature falls back to zero?

If the red light stops flashing be grateful.  It is supposd to..

If the needle records properly then drops back to zero - hmmm - tricky one.  It is receiving a signal fom the sensor so no probs there - the next place to look is at the voltage regulator that services the temp gauge - I'll see if I can find a picture for you - hang about.

M

thanks mate the light flashes normal few seconds the gauge falls to zero sometimes wont even move

Hi Pepsi

Try everything simple first - like checking the fuse is correctly located, not damp or corroded and check the wiring on the sender - not damp or damaged.  You may just have a poor connection.

Anyway - this is the best I can do.  Don't know you vehicle age so I took a bit of a guess.  The Haynes manual shows a Voltage Stabiliser in the circuit for most models:

thanks michael hopefully now i will beable to sort it

there is also a diode on the back of the instrument cluster if that has gone you will get strange needle movement