Step by step repair guide on how to repair a dim automotive headlight. This article
pertains to all vehicles.
Difficulty Scale: 3 of 10
Tools and Supplies Needed
- Test light
- Protective eye wear and gloves
- Wrench set
- Screw driver set
Begin with the vehicle on level ground, in park with the emergency brake set.
Step 1 - Access the rear of the
lens and locate the electrical connector.
Step 2 - Release the electrical connector from
headlight lens. Next, attach a test light lead connected to the positive side of
the battery and probe both wires. Of the two wires, one wire should not illuminate
the test light, while the other should illuminate the test light brightly. A dim
headlight will slightly illuminate test light which indicates a bad ground. Follow
the ground wire to its mount location at the body and disassemble. Once apart, clean
both connector ground connection, with the body metal using a small wire brush,
Headlight Electrical Connector
Once the job is complete turn the headlights on to check operation. If the
is out, replacement is required.
Proper headlight operation is necessary for the driver of the vehicle to see
the road in front of them in dark conditions. A headlight that is out or dim present
a safety hazard which can be corrected easily and inexpensively. Headlights draw
a significant amount of amperage that can cause problems unless all electrical connections
are corrosion free, therefore inspection of these connections is necessary. A headlight
is dim because resistance causes full voltage to be restricted.
Article first published 2016-02-04