Well, I think I finally caught the dreaded trailer harness adapter electrical gremlin. Dang it.
I thought my dash lights weren't working the other day, but it was bright and didn't check it later. But I went to drive my T100 this weekend on a trip, and I got down the road and noticed the dash lights were definitely not working. The dimmer had no effect.
Thanks to this wonderful forum, I remembered that trailer harnesses can cause all sorts of issues. So on a hunch at the gas station, I checked to see if my taillights were working.
So I ran in a bought some new fuses for the taillights and dash lights to rule them out. New fuses had no effect. So I checked my adapter and the plug had a lot of water in it, and knowing that can cause issues, I got under the truck at the gas station and followed the trailer harness wires hoping that I could unplug it and that would fix the issue. Well, unfortunately there was no plug, and the PO had the harness wired in using Scotchlok connectors, all wrapped in tape. Well, I pulled all the harness wires out, and my my lights still didn't work. So back home we went, since it was getting dark, and we had to switch cars.
Everything was fine not long ago, and I towed my parent's trailer recently and everything went well...the trailer lights all worked correctly. So everything was fine recently.
So the harness is unplugged, but I haven't pulled all the Scotchlok connectors off yet. That may help, which I will do in a bit.
Is there anything else I could be missing, or any other suggestions? The only lights that don't work are my dash lights, license plate lights, and my running/driving lights.
The headlights, brake lights, and blinkers all work fine.