91Dump

So the first one is a black box mounted behind the glove box,

the second one one is located down on ten fire wall just over the front inner fender

91Dump

Second photo didn’t upload

nonrev

The first on I believe is the controller for the RWAL system

91Dump

I thoughts that’s what it was for I will. E removing that from the harness before it goes back in the truck since the po deleted everything on the frame and has already cut the wires at the back

oliver foster

The second black box in the pictures controls the grid heaters on the '89 and '90 12V trucks.
I think that box might be on the '91.0 trucks as well, but I would have to check to remind myself

91Dump

Thanks Oliver! Now that’s controlled by the computer I’m supposed to half up in the drivers front fender right?
i say this because it’s Mia

oliver foster

That grid heater black box is mounted to the the firewall roughly under the steer shaft.

91Dump

The truck is a 91, nothing in the message center works, so would there be a way I can check to make sure that’s working and if not would it be safe to wire up off of a switch and delete that whole box?

oliver foster

I would not put it on a switch, as it could be left in the on position. Those grid heaters use a LOT of power.

If I had to rig up a system I would use a push button so you could not accidentally bump the switch and leave it on.

Or depending on how cold it gets when you plan on driving the old girl, not hooking them up at all.

91Dump

There in a dumptruck that I plan to use for work kinda year round, I would do a push button that would be ok, the cab was rotted off the thing and I had another laying around from a parts truck but the more I have dug into this thing the worse it’s gotten

oliver foster

Well let me know if you need another Cummins reg cab, cab to work with. I am up in VT and have stuff like pretty decent cabs [or about anything else you might need for it] around my shop.

91Dump

I need a throttle cable the whole thing from the pedal to the pump, not to sure of anything else I know the hood and dash harnes are very but up but thinking I will put everything I can on toggle switches or something like that