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I’m not trying to computerize anything, and it’s really not my first choice, but looking at the circuitry in the box, it’s obvious that it’s controlling more than the glow plug timer. If that were the case, a $5 rotary timer switch wired to solenoid would be the simplest fix, and eliminate the...

Thanks everyone. I’m still cogitating on this one, and looking at the various functions of the box. Functional glow plugs are not an issue here in South Texas, but of course everything else is. It might be that just buying a new box and controller , and keep using this one until it fails is...

0k, I’ve sort of gathered Thru reading other posts that this PCB isn’t the best. I need the vehicle to be reliable so will change to the EESS and TSU and glow plugs. Is this basically a plug and play replacement, or is more involved. In looking to source there components, I can’t seem to find...

Howdy all. A couple of questions.... but first thanks to those who answered my last post and suggested the grounding harness. I did, it worked like a charm. Now everything is working on the truck except the ammeter and the wait light. I have the old prestolite white label PCB. In reading the...

Thank you very much. I will check and clean all the contacts tomorrow. What circuits do the 2 breakers protect? It seems like the maintenance manual says they are 15 amp, but not much more about them.

Howdy all. I am new to the group and vehicle. I’m the curator of an Aviation museum in South Central Texas, and we acquired an M998 from the state to use as a museum courier for local trips to town When we picked up the truck, there were no batteries in it. The facility jumped it ( they had...