I have not been able to find a fuse block diagram that shows which fuses are there. The fuse block is mounted vertically on the forward side of the firewall. There are also several other individual inline fuses there.

There are also some smaller fuse blocks in the rear under the bed.

Does anyone have a diagram that indicates which circuits and what size fuses are needed? I would like to make that available here on the site.

I will try to trace some of them soon and report.

Steve here is the other fuse blocks under the bed. I’ll see what I can find on the front ones. I can maybe read the tape on each wire. It will not have the fuse sizes.

The listing

Mine are similar under the bed.

Top set:

Bottom set. (The top left 3A fuse was used for the step control, but my current step doesn't use it. I refused to 15 amp for a 12V 15A feed to the step area.)

quote:

Originally posted by Steve VW:
Bottom set. (The top left 3A fuse was used for the step control, but my current step doesn't use it. I refused to 15 amp for a 12V 15A feed to the step area.)

Interesting your step had 3 amp and mine lists 8 amp

What is the 25A white wire on terminal 6? (top block)

quote:

Originally posted by Steve VW:
What is the 25A white wire on terminal 6? (top block)

That’s a goods question? It goes forward with the big bundle internally along the exterior wall. I’ll have to investigate. Probably have to put the tracer on it. I pulled it and saw nothing off. That’s a heavy gauge wire and fuse. Seeing it’s not on the menu I wonder? The wire is in the middle of the bundle. Must be from Barth?

Any guesses? What else would pull that much amps from there?

Refrigerator? 3 way refers do draw a lot from 12VDC when run off DC.

That is very likely the answer. The refrigerator heating elements are around 250 watts and that would be consistent with a 25 amp supply.

Mine at least draws less on 12vdc than 120. Mine only operates with the ignition key on. Or shut off the gas on the hwy.