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Without getting into all the "why's and wherefores," when dismantling my M37B1, I labeled a circuit breaker as a "battery box circuit breaker" as if it were installed on the box.

I'm aware that the breakers are supposed to be mounted on the cowl vent bracket, and I'm certain that the truck had one CB installed in that location.

Complicating the problem is that, while the holes on the CB line up with the holes on the cowl vent bracket, the #10 machine screws that I retained on the CB do not fit the holes in the bracket (the manual calls for #10 screws of the self-tapping variety, but the ones I saved are machine screws). To make matters worse, the holes on the CB line up perfectly with holes on the passenger seat base next to the holes for the seat latch as if the CB were installed inside and adjacent to the battery box.

While the truck came equipped with both the power plant and personnel gas heaters, I can find no reference in the applicable TMs to an included CB for these installations.

I can find only the one circuit breaker, but I'm beginning to doubt my sanity.

Help!

Sorry I can't help on that one John as I run a Painless Performance harness.
Gary

Thanks, Gary. I'm using the not-so-painless harness.

After reviewing my photos, I've solved the mystery, if not my other "issues."

The circuit breaker in question is installed inside the passenger seat frame. I don't have the specific wiring diagram or information for this CB, but understand that it may be in a control circuit for radio power.

The other CB (which I have safely stored in a still undisclosed location) mounts on the cowl vent bracket behind the dash and is intended for the horn.

Now, if I can just locate the undisclosed location....