no back up lights

[freddie]

On my 03 Avalanche one of my back up lights stopped working. So i bought new bulbs. The old bulbs didnt look blown so i tried them in the tail lights and they worked. I checked all the fuses and they were good. Also when i changed the bulbs i changed both sides and now neither one will work. Some how i did get them both to come back on for a little while when i was testing the socket with a test light. Some one told me to look at the circuit board but i really dont know what do with it. Why do we even have a circuit board? How do i tell if the board is bad andhow bad is it to change out? If anyone knows anything about this please help. Thanks.

[Enkeiavalanche]

This is the factory lights right? Check the socket. Alot of Avalanche owners have had problems with them coroding. Are you the first owner?

[freddie]

I am the second owner. The sockets appear to be in good shape. Anderson yes it is factory.

[Enkeiavalanche]

And you said with the Test light it works fine?

[freddie]

Tested the test light ong the battery before and after to make sure ot works

[Enkeiavalanche]

Did you test the leads by the socket? (the wires)

[moogvo]

try to flex the circuit board a little while they are on. See if they intermittently come on and go off. If they do, the board has either a broken trace or a cold solder joint.

[freddie]

I tested just the inside of both of the sockets. I was kinda short on time. It will be thursday or friday before i gwt to work on it again. Just wanted today seee what else i need to check. Sorry for the misspelled words my mobile web wont let me fix them for some reason.reading

[RayVoy]

So, let's not get this problem overly complicated.

Before you took it apart, you had one side working, one side not working..........................probably a bulb.

You took both side apart and now neither side works...............probably using the wrong bulbs, or a blown fuse.

[moogvo]

I tested just the inside of both of the sockets. I was kinda short on time. It will be thursday or friday before i gwt to work on it again. Just wanted today seee what else i need to check. Sorry for the misspelled words my mobile web wont let me fix them for some reason.reading

Don't ya HATE when that happens?! I even have that problem on my iPad... It decides to alter words I type in. (that's why every single one of the posts I make from my phone or pad have been edited)