thanks to dieselgiant's excellent writeup on glow plug malfunction testing we saved some $$ today. son reported glow plug light not going on after turning key. did the diagnostics outlined in dieselgiant's site and found no1 (thank god!!)
GP was showing infinite resistance. pulled it and still checked out bad.
changed it out with a good tested used bosch GP and all ok now. GP light back to normal operation.
had noticed on cold startup previously some grey/black smoke so the GP was probably on it's way out before it manifested itself in the no GP light on the dash.
we used a crappy multimeter from radio shack but it still managed to give us the readings needed.
so if any other members are experiencing some smoke etc on startup it may be a good idea to check your GP system.
