1991 Celica GT.
Right so, I first installed the stereo fine temporarily. It had a cut harness. But I wanted to use butt connectors so I went to reinstall it. I was overly confident and must have touched the ground to something bad or...something. So then the stereo didn't work when properly connected and the lights on the gauges (the ones controlled by the dimmer switch), clock, and dome lights stopped working.
Then I checked under the Hood
and it showed I blew out the 20A dome fuse. Okay, so I replaced it. Now the clock works...dimmer switch still didn't light up anything. Radio could play music on the radio, however when I plugged in my phone to play music, the music sounds distorted and muffled. Yet the radio sounds fine.
Also when I turn my headlights on, the lights to the clock dim about 80%. Sometimes the turn signals are weak. I've checked all the 10A, 15A and 20A fuses, I'm pretty sure. Anyone have any ideas?