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k...bad relay it is. Took the relay apart (pried the top off) cleaned all the gunk off with a steel brush (there was alot of gunk). Re-assemble = voltage to glowplugs. Got a good charge on the batteries...took a few goes...truck started and runs like a champ! I'll buy a new GP relay tomorrow...

OK. Cleaned up the relay and am now getting voltage to the glowplugs when the key is turned...just fighting weak batteries and the cold now...

With the jump to ground (from blue wire) I got no action out of the relay. I'm assuming this is the problem. It's late and no parts stores have what I need, so I'm going to pull the relay apart and try to clean it up a bit. If this doesn't work, I'll try what you suggest Tow. Thanks for the...

wait...the relay is the silver, beer can looking thing; right? I'm measuring the wrong stuff....crud. Standby for measurements...

OK, just jumpered the blue wire (right side of relay) to ground. Got a spark, but no noise. I have 13ish VDC on both sides of the relay at all times....bad relay?

Voltage from the one in the engine bay. I get one click after the wait light has been on for a while, but no change in voltage anywhere. Are you talking about the starter relay under the dash? Was unaware that there was another relay under there other than the starter relay.

BTW...I have converted the glowplug system to 12VDC.

I hate to be lazy and not research threads for this answer, but I am very pressed for time...we're getting about an inch of snow an hour. My M1009 cranks fine, but won't start. I am not getting voltage to the glowplugs when the wait light is on. I am getting 13+vdc to to relay. Anyone know...