Howdy Guys,
I am thoroughly perplexed! I have read thread after thread after thread about the preglow system and have found nothing similar to my wagons problem...


upon starting the car the preglow light comes on, but the glow plugs are not heating. luckily I live in central California so it does not get that cold here and am able to start the wagon after a couple of try's... then the preglow dash light stays lit as long as the ignition is on.


I replaced the relay... no effect on the problem!
I tested the glow plug wiring... Each wire was .6 Ohms!
Tried to find the metal temperature switch (it is not under the intake manifold, the coolant temp is)!


Any advice would be GREATLY appreciated!

Well I solved the problem!

After tearing my hair out trying to figure what component of the pre-glow system was failing, I decided to chase the wires to each connector. The first connector I pulled loose was X2 on the relay and found that one of the 2 ground wires that are soldered to the female connector had broken off.

I reconnected the broken off wire to the connector... And the pre-glow system works like a charm!