One headlights works when high beams are on

[77Stepside_]

Bought the truck 2 weeks ago. Noticed only one headlight works when on high beams. A friend had the same problem, he replaced the headlights and problem solved. So I did the same, didn't solve the problem. What could the problem be?

 

[crazy4offroad]

Sometimes the pigtail will get corroded, they sell replacements on LMC. If it's the passenger side light there is likely a break or pinch in the wire between the driver side and passenger side harness, since the passenger side feeds from the driver side.

 

[Camar068]

Might be the connector for that bulb being loose. It could be a quick fix (I need to try it on mine). Add some solder to the connection on the bulb itself to make it thicker. Otherwise most parts stores have the connector.

 

[smoothandlow84]

Bad connector, sometimes corroded at plug. Clean and use dielectric grease.