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Do you have 12 volts on the Pink/Black wire that goes to the other small terminal on the relay? If not, them you may have a blown fuse in the fuse box. Should be fuse #17

Your way is fine. In all actuality it is a full proof way to ensure the that the GP under test is actually functioning properly. The ohm test is a good first "Go or No Go" test. If it's high resistance or open it probably is defective. After the ohm test it would be a good idea to put the GP...

Positive to terminal, negative to the metal part that threads in to the block.

I put them on to aid with troubleshooting. A quick glance at it will visually confirm certain functions. Saves time and effort trying to get a volt meter up under the dash.

Nice observation! I completely missed that!

Thanks for posting the info.

Due to the Post Office not open on Monday the 16th, all cards ordered today will be shipped out on Tuesday the 17th. Thanks to all that ordered cards.

On sale till this evening.

I understand your concern and do appreciate your patience. Here is a hint: Friday the 13th is coming. I should be able to post additional details this Thursday. Thanks.

The GPD3.1 cards have a few minor engineering changes that are not on the previous cards. Otherwise they look and function the same. Yes you can still easily add a manual back up momentary switch to the GPD3.1 card.

Hmmmmm........ I'll see what I can come up with.

Yes they are. www.glowplugcards.com

I hope your daughter really appreciates you repairing her truck.:D

That's a great idea. Believe it or not, we have looked into making a remote LED board for the GP cards but the price to incorporate the change in the current PC boards would not be cost justifiable for the limited number of remotes that would be sold. It is a good idea and can be done very...

The GP cards have 3 LED indicators. GREEN -- Card has power applied to it. YELLOW-- Same a WAIT light RED -- Card is sending ground command to the GP relay

That's similar to what I did to my M1009. I added a volt meter that shows the voltage on the glow plug side of the relay when the glow plug relay is closed. After the glow plug relay opens, the volt meter indicates the 12 volt side of the vehicle electrical system. You could have a light in...

My 1986 M1009 was a US Navy vehicle.

Over voltage and reverse voltage are the most common reasons for GP card failures. Send me your card and I may be able to tell you what caused the failure. It might even be repairable.

I think a NAPA BR530 is what I used.

Got the shelter completed and installed on the truck. Used it for a rover operation during the PA QSO Party last weekend.