pre-heat led random

[sledge]

Hello all! Awesome forum, hope to get along and around

Where can I find the temperature sensor which triggers glowplug pre-heat?

For me it acts random even at same ambient/engine temperatures! I.e., quite often pre-heat indicator does not light up in winter and does lit up in summer at times.

Cheers!
sledge

[Kwik]

the glow plug relay is behind battery i think that controls most things

[sledge]

Cheers Kwik,

Just checked with multimeter: glow plugs are always heated for 15-20 seconds, the pre-heat lamp does not turn on on instrument panel.
If it ever turns on, stays for just a couple of seconds - irregular. I tested the lamp wire from the glow-plug relay box, and it is dead from there.

But the glowplugs apparently are heated regardless.

So the solution is on a cold day keep ignition on for 20seconds and repeat several times.

Wonder if replacing relay box would solve instrument panel LED behaviour..

Cheers,
sledge

[Kwik]

get another one from breakers and switch it over see if that does the trick

[Ricky]

The light only ever stays on for a few seconds, but if you wait you will hear a click after another 13 seconds or so when they actually turn off, also the dash lights will get brighter when they go off.