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1. Check the Violet/White (VT/WH) wire of the headlight switch for hot-at-all-times power from fuse #20 (15 amp) of the Battery Junction Box (BJB). Also check the switch itself for power feeding park lights coming out of the switch.
2. Check the #20 fuse holder for a missing, blown, or poorly connected fuse.
3. If the fuse is OK, inspect the wiring harness on the driver side front corner where the main loom wraps from the BJB to the inner fender for corroded or broken wires
On these cars the headlights get power from a right and left fuse and the headlight / dimmer switches provide the ground circuit. Both headlights are connected to one ground wire for high and one for low beam. So if one works and the other does not, the problem should be in the wiring before the headlight switch. Red is for high beam and red-white is for low beam. You should be able to jumper the red-white wire on the right headlight and make the low beam circuit for both sides work to test it.
Most cars have a Headlight relay and within the relay different terminals will split the power to parking lights, headlights, etc. It is possible that part of the relay burned out while the balance still works. You may have a fusible link (wire) to the relay box for just the headlights. A good Autoparts place should show the requirements.
I suspect the bad connection on the battery caused the Starter to draw power or a ground through the easiest path of least resistance. This shorted the grounded Relay.
behind the fuse box there is a gray connector. check the red/white wires on either side of the connector for 12 volts. if no voltage on either side replace 40 amp fuse in engine compartment fuse box, if voltage on only one side, repair the connector connection overheats and melts inside the connector
Power may not be arriving at the switch check red/white wire coming to switch with a tester. If it doesn't have red/white check the thicker wires coming to it and make sure to check all the fuses in the engine compartment fuse box and the one in the driver kick panel area. On those may be a panel in between the driver door and left end of dash. Check any fuses mentioning HL Headlight Lamps etc. to assure they have 12v coming to the fuse. If not could be main fuse or fusible link.
UNDER THE HOOD ON THE DRIVERS' SIDE YOU WILL SEE THE FUSE BOX. LOOK FOR THE FUSE DIAGRAM UNDER THE FUSEBOX COVER, TO LOCATE THE FUSE FOR THE HEADLIGHTS. SHOULD BE A 10 AMP FUSE. CHANGE IT WILL A GOOD ONE, AND LET IT SHINE. HOPE THIS HELPS. KEEP ME POSTED. THANK YOU FOR AN HONEST RATING AND FOR USING FIX-YA. GOOD LUCK
The CEM or Computer Engine module is located on the fie wall, it looks like a small box with electrical wires coming out of it. If you are standing in front of the car the box will be located to the right on the fire wall. You may need a new main fuse or fuse linkage. Look in your fuse box and see what fuse may be blown. You also have ( 2 ) fuse box/location for your car ; one in side the car to your lift knee and the other under the hoog near the battery. If you crash was on the side of the battery you may need to replace all the wiring that could have been pinch or damaged in the crash. Any electrical wiring can blow a fuse because the are all connected in a complete circle. So, you must trace all electrical wiring especially on the side of the crash for damage. Go to a junk yard for your parts, the part my not be at the dealer or out of stock to be special ordered........runjoe