88 D 100 electrical issue

Mo; Pull #8 fuse [20 Amp] and look to see if it is burned. Push it in and out a few times. Using a good test light [non LED type], check the pins of the fuse itself. The test light should be on on each pin. The power goes from there to the headlight switch via a pink/red tracer wire. You can pull the plug out of the headlight switch and check for juice at the pink/red terminal ---- or you can leave it plugged in and stab the black/yellow wire coming from the headlight switch with a sharpened point of the test light. The test light should be on only when you pull out the headlight switch knob. ----- From there it gets spliced and goes to all the parking lights. --good luck--