[Vwdiesel] Glow plug light issues

[Roger Brown]

Fernando Fiore wrote:
>
> My erratic glow plug light while driving was also diagnosed and concluded to
> be the temp sender for the glow plug circuit.  As already stated before,
> make sure you are checking/changing the right one.

Yes, that's been my experience as well, at least with certain relay designs that seem very sensitive to out of range temperature
sensor inputs.  Also if the sensor check out OK, you still can have wiring problems or as I had a broken connector that let the
T input terminal fall away from the relay terminal.