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Possible problems are; 1. One or more of your GP's are open. 2. The system votage is higher than normal. It sounds as if the GP module is functioning properly and that you have a few bad (open) glow plugs. Is the GP system the stock 24 volt system or has the dropping resistor been bypassed?

Wait light goes out, relay remains closed as you described. They are not matched. Your card is functioning properly.

Welcome from Centre County. Karl

Up under the dash on the left hand side near the parking brake foot pedal. Should be in a black plastic housing about the size of a pack of cigarettes. Karl

I will try to make a video of the GP board display. Good idea. Karl

The Wait light will stay on for about 15 seconds for a cold start. After the engine is started, the GP card will re-fire the GP's, this could be as long as 15 seconds or it will cycle the plugs on and off depending on the voltage to the plugs. What you described sounds normal to me. Karl

PM sent.

Pink wire should have 12 volts on it. Connecting the light blue wire to ground should close the relay. Check the fuses to see if there are any that are open. Karl

This link may help you. http://www.dmv.state.pa.us/driverLicensePhotoIDCenter/license_classes.shtml Karl

That is exactly where I got it from! I hope I didn't infringe on any patents. Sorry I don't have any info on the NSN. Karl

Nope. It's a Craftsman Special. But it worked for me. I got the idea from another thread on here about Deuce head gaskets. Karl

I received your PM and it's going out via UPS tomorrow. Glad I could help out. Karl

I can loan you one. PM sent. Karl

I have updated the color GP schematic attachment. The temperature sensor wiring is now correct and a couple of the wire descriptions were not properly drawn. The original schematic in the TM has 4 errors in it. Karl

Version 2 is coming soon. Karl

I paid $75 each to have mine done. That includes having new freeze plugs installed. No valve work was needed. Karl

Welcome from State College.

An interesting thread on the Deuce and coolant filters. http://www.steelsoldiers.com/deuce-modification-hot-rodding/11143-cut-open-coolant-filter-deuce.html?highlight=cut+open Karl

Sounds like relay chatter from the GP relay. Try cleaning all the connections on the GP relay, remove the GP card and clean the card edge connections. Visually check the solder connections (on the GP card) near the large transistor that is riveted to the board. Make sure they are intact and...

The diode that burned up is a 24 volt zener. It is not a relay spike suppression diode. When it goes the switching transistor usually goes as well. Karl