Car Repair World

DRL Light Bulb Replacement DRL Lights Not Working Helpful Information DRL bulbs (daytime running lights) have been installed on vehicles since the early 90's and have been proven to be a helpful safety device which helps opposing drivers see oncoming traffic during daylight hours. These bulbs are illuminated continuously as the vehicle is being driven and therefore fail often. Best Practices When replacing DLR bulbs use a high quality bulb to avoid premature failure. AC Delco provides a heavy duty bulb which is designated by an "LL" which means long life. Step by step article on how to replace a DRL (daytime running light) bulb. This article pertains to most vehicles. Difficulty Scale: 2 of 10 Tools and Supplies Needed Replacement DRL bulb Small screw driver set Torx head drivers Protective eyewear and gloves Begin with the vehicle on level ground, engine "OFF" in park with the emergency brake set. S...

Turn Signal Repair Car Blinker Turn Signal repair Helpful Information A turn signal switch is used to operate the direction signal system in a vehicle, which helps communicate an intended direction. Some lighting system designs integrate the turn signal and brake light systems which share the same circuit. Most lighting systems are grounded near the light bulb, which will produce a single bulb operation failure. Easy step by step guide on how to repair an automotive turn signal system that is not working, this information is presented in the order of probability and pertains to most vehicles. Difficulty Level - 4 Begin with the vehicle on level ground, in park with the engine "OFF". Step 1  - Turn the ignition key to the "ON" position, (do not start the engine) this will power up the electrical system for testing. Ignition Switch "ON" Step 2  - Locate the power distribution center (PDC) or fuse panel to check all system fuses.  Lear...

Tail Light Test and Repair Exterior running lights and tail lights out Helpful Information The running light circuit is controlled electrically through a BCM (body control module) or a LCM (lighting control module). These computer controllers are designed to warn about a bulb failure by illuminating a warning light on the dash. In older cars the headlight switch performed the actual power distribution to the headlights instead of using a relay and computer. American car's running lights are integrated into the blinker bulbs, while Japanese and European cars have separate lighting systems. Vehicles that have towing capabilities use a separate wiring system to power trailer lights, which are protected by additional fuses located in power distribution center. The rear license plate bulb is also illuminated when the running lights are on. Some systems are equipped with a timer that allows the lights to stay on for a predetermined amount of time after the driver has exited the v...