Clearance lights

Try State Trailer Supply I think they have a store in the northwest. I found a replacement LED brake light assembly and a clearance light after searching the internet extensively... they have an amazing selection. Good luck.

:C

Look closely on the lens. There should be an SAE or manufacturer number.
If incandescent lamp is problem, replace with LED lamps.
The sockets have a good chance of rusting. Use wire brush to clean. Then use Bulb Grease to coat lamp and socket.

It should be just a bulb. take a small flat blade screwdriver and look on the sides of the clearance light for an indent or something to allow you to pop the lens off. Sometimes there is no indent and you just need to pry the side up. After the lens is off the bulb should pull straight out.

The bulb number is probably printed on it. If not just take the bulb with you to the auto parts store and match it up.

If it's just a bulb, you can get a replacement at the auto parts store.