so havent really paid much attention to it but i noticed my cargo light didnt work when i was hauling wood the other night. i can turn the dimmer switch all the way up and nothing.
brake light near them works.
reverse near tailgate are working.
dimmer switch works.
all interior lights work.
just the two white ones to the side of third brake light dont work??

any advice ? not good with electrical

 

dead bulb, wrong harness (single bulb), wiring problem....

take it off and look

 

Is there a harness; did the Cargo Lights work before ?

As P.C. said, take the light off, 2 screws, and check it out.
If both lights are out it would seem funny to have two bulb go bad at the same time.
If the problem is not obvious, pull the bulbs and check them with a multimeter, if they are OK, check for power at the plug.
AND if they never worked, maybe you just need the harness.

 

Probably just burned out bulbs or bad connections.

Give the connectors a good cleaning and check the bulbs.

While you're at it, why not upgrade to leds?