problem with head lights ?

[die hard]

so here my problem my right side head light is dim ? when light is on low both hi and low are bulbs are on but high is very very dim and low is little brighter but still dim  .same with left side both bulbs are on .when i unplug right  side head light only one of the bulbs are on on the left side ? its got me puzzled hoping some has had similar problem before and found a fix to this problem ! truck is a 2001 .thanks hope you can help

[silveradosid]

you have a ground problem check the ground connections for the headlights

 

[die hard]

update after messing with  truck for little while cleaned all the grounds still no luck .turn out to be a fuse ? well looks like i learned something to day .you would think a fuse would cause light to go out not dim .

[sefiroxx]

Corroded connection at the fuse or a fuse that is partially blown. Either leaves a much smaller amount of conductive material which simulates a resistor , limiting the amperage.

Fortunately, for you, you caught it early. This type of limited conductive material leads to too much amp over the remaining material causing it to heat up and at times, form plasma - creating a huge plastic mess