Club 80-90 Forums

The glow plug light on my van is staying on longer than it used to and comes on even when starting from hot, checked voltage at glow plugs, no problems there and the plugs are new. What is the most likely culprit, the relay or temp sender

Did the glow plug light come on when hot before ???? Plus how often do you use the van as it is a cold spell?

James the light never came on with hot engine, i have been using the van every other day, only started doing this on Tuesday.

I would look at the relay then, but first put multimeter on glow plugs and see if there on with light or go off and light still on? The new glow plugs might have upset the relay if its oldish, on my 1.9 derv caddy van the glow plug light comes on when hot but for a second or two ?

Cheers James, will try that in the morning

Your welcome buddy if you need any more help giz a shout!

It'll be a loose/bad wire to the coolent temp sensor, the sensor itself, or the relay. I'd emagine its fully heating all the time even when it doesn't need to? If it doesn't get a temp reading it defults to max preheat.

Changing the heaterplugs won't have affected it. The plugs run on a bit after the LED goes out anyway so thats not a fault if you find it does it (LED tells you its not ready to start, not glow plug operation!).

New relay and temp sensor for good measure, sorted now, cheers