Today I dug into my dash wiring a bit to see what I could find as far as my short in my horn/dimmer lights is concerned. Couldn't find the problem under the dash, but I did come up with lots of interesting knowledge/info/whatever.
First, the PO has jumped this connector with some sort of resistor. What is this thing, and where does it actually belong?
Wiring-3 by
colbyjstephens, on Flickr
From dremu's wiring diagrams at
http://brochures.slosh.com/ in the chasis 1 section for R/V trucks, 89-90, it looks like it's something to do with the ignition module. I was thinking maybe a neutral safety switch? Never have tried starting it in gear. Why would it be jumped with a resistor?
Most importantly, where does it actually belong? I didn't see a missing connection under there, but thought it might belong on top of the steering column, which would be hard to see.
Next question:
Where does the DRAC unit belong? The previous owner had it just dangling in there, tucked up around some other wires.
Since the thief stole my stereo, I'm looking at this wiring and trying to figure out what they connect to? The stereo, I presume, but that's a lot of plugs for the stereo. Can someone shed some light on this? I'm not seeing these listed on the wiring diagram (Chasis 1 or 2):
Wiring-1 by
colbyjstephens, on Flickr
Here's a wiring connection that I know the Previous Owner spliced into the stereo, I just don't know much about it. The fuse in this particular connection was blown:
Wiring-2 by
colbyjstephens, on Flickr
That fuse connection was joined with this wiring harness... what a disaster. You'll note the upper right end of that wiring harness is where it was connected via the fuse in the last photo:
Wiring-6 by
colbyjstephens, on Flickr
WTF is this sh*t?
Wiring-7 by
colbyjstephens, on Flickr
Honestly, WTF? That's messed up. Spliced and hacked and crap. Uggh. Check out the 1" long splices.

So, is this a modified stock harness, or was this a harness that would've gone with the after market stereo?
And now just a couple more photos to make you laugh at this half-ass work:
Wiring-5 by
colbyjstephens, on Flickr
This was the power to the stereo:
Wiring-4 by
colbyjstephens, on Flickr
