M1009 glow plug problems

[irishvin]

Hey guys!
I'm trying to figure out why my glow plugs only get power after I start to crank the engine instead of before, like it should. I encountered this problem after my engine swap and just got around to fixing it (or trying to) and found that the starter relay was broken. I replaced it and it's still not working properly. I don't know what to do now. I tested the incoming line and the line coming out and the only time they come on is during a cranking.

Thanks in advance!

 

[Warthog]

The TM 9-2320-289-20 tech manual has a step-by-step procedure to test the system.

 

[irishvin]

Thank you al9t I think I found the problem is gp card

 

[Warthog]

Be sure to read the GP Operation sticky. It helps explain how the system works. Has a great video.