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If you unplug it, it will simulate a cold engine.

What temp sensor did you put in? The WT3000 is the proper sensor. It has high resistance when cold and a lower resistance when warm. Unplug the temp sensor and see if the Wait light comes on.

Under the bed is storage, (2) batteries, charger and some wiring. The item mounted to the ceiling is a fold down television.

A few of the M101A2. It still looks like a trailer from the outside. The S-280 build will be the next one.

Moved to proper forum.

That looks like a temp switch and not a sensor. Take it out and put a WT3000 temp sensor in there.

Leaving for Gilbert soon. Hope to see a few friends there as well.

It could be on the passenger side, it's not supposed to be there. As Firefox states, it may have been removed, broken or relocated. Pictures of what you have may be of some help to us. At least the card is functioning now, you have come a long way from the mess you started with. Congrats on...

Warthog posted the info. The picture of the fuse box is from my M1009. Fuse #12 is 24 volts and is labeled so on the fuse box. It sounds as if the radio in question, lost its audio output amp. The RF portion seems to be functioning based on the signal strength indication. But I am not a car...

I have a feeling that the GP card is not getting the proper resistance from the temperature sensor. That would keep the Orange LED/Wait light from coming on. Check to ensure that the Yellow and the Black wire going to the engine temp sensor are intact and are connected to good sensor located...

Pull the card and see if the voltage on the Dark Blue wire goes away. Do the LED's on the card light up?

Moved to proper forum.

Thanks for the compliments. This truck and camper are scheduled for use on the 2019 MVPA Convoy. So it's not going to be sold anytime soon. Now do I fix up the 5 ton or rebuild the M1010??

The sensor to the rear of the engine on the passenger side of the block is for the IP advance/high idle. It's actually a switch and not a thermister. The GP sensor changes resistance value with temp.

I agree, it does do well down hill.......

Factory location of the temp sensor was on the drivers side head near the firewall.

Finally got a chance to try towing the M101A2 camper behind the modified M1008. Rebuilt engine, transmission, transfer case, new driveshaft parts, new spring bushings, cab mounts, engine mounts, new shocks and a few other new parts. This truck rides much better and handles much better than...

Power on the Pink/black wire is normal. This powers the GP card and the relay. The GP card sends a ground command on the Light Blue wire to the GP relay to close it. The Light Blue wire will have voltage on it (thru the coil of the relay) if the GP card is not sending a ground command to the...

I would use a piece of #18 gauge wire for monitoring the 12 volt side. Putting a fuse inline near the 12 volt source is highly recommended. You can use the same wires from the 24 volt meter. The ground is the same for both sides of the electrical system. The new meter(s) will come on and off...

In the photo of the relay, it appears there is a black wire going to the terminal with the orange wires. Where does that wire go? Is it connected to the Wait light? If so, it should not. You will need to remove any and all additional wiring, splices or other hacks from the civilian controller...