How to Troubleshoot Low Beam Lights on a 1990 Lincoln Town Car
- 1). Turn off the Lincoln Town Car's engine and open the hood. Put on a pair of latex gloves.
- 2). Open the access panel above the headlamp and lightly tug on the electrical connector at the rear of the headlamp. It should be securely connected to the headlamp assembly. If it is not, plug it in firmly. If the low beam headlights are still malfunctioning, the bulb may need to be replaced.
- 3). Remove the electrical connector by pulling it out of the assembly. Remove the retaining ring from the low beam bulb by rotating it counterclockwise. The low beam bulb is the top bulb on the headlamp assembly. Slide the ring off the bulb.
- 4). Pull the old bulb out of the assembly and push a replacement 9004-type bulb into the assembly. Slide the ring onto the new bulb and rotate it clockwise to secure it in place.
- 5). Reconnect the electrical connector and close the access panel. If the low beam headlights are still malfunctioning, the problem may be a broken fuse.
- 6). Remove the cover from the fuse box under the hood. Locate the number 12 fuse and inspect it. if the metal rod inside of the fuse is broken, it will have to be replaced.
- 7). Pull the old fuse out and replace it with a new 18A fuse. Place the cover back onto the fuse box and close the hood.
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