Step by step guide on how to troubleshoot and repair automotive tail and running
lights, this information pertains to not working, dim and flickering lighting systems.
Begin with the car on level ground, engine off with the parking brake set, wear
protective gloves and eye wear. When performing tests avoid connecting power wires or
terminals to ground (metal), fuse damage can occur, most automotive bulb testing
procedures are done in this manner.
Difficulty Scale: 4 of 10
Step 1 - Identify the light or lights that are
non operational. If one tail light bulb has failed, the problem is probably the
bulb itself or a bad connection, if all lights are non-operational, follow down
the guide to Step 5.