1999 Chevy Suburban Rear Barn door Help!

[PA-MinuteMan]

Hello Everyone!

Long time lurker, first time poster

I'm building a 1999 Chevy Suburban C1500 and I need your help.
I am having trouble with the rear barn doors, For some reason they won't lock. I thought it was the actuator so I took the panel off and inspected it, and it looked like it was though a war. So I replaced it with a new one, Still nothing, So I took some sand paper to the door contacts and got them nice and shiny and still nothing....

That's where you guys come in!

What should I do next?

Get new contact switches?

Please help me because I really don't know what else to do

Thanks,
PA

 

[Flyboat]

I would see if there is power at the contact switches. I have a 96 and the door locks are a little different from a 99. My wife's 99 had some sort of delay circuit on the rear doors. Oh btw the door has to be shut to lock it, contacts don't contact otherwise.

 

[rayra]

Start checking all the ground connections. Corrosion issues could easily be interrupting the electrical path.

 

[PA-MinuteMan]

I would see if there is power at the contact switches. I have a 96 and the door locks are a little different from a 99. My wife's 99 had some sort of delay circuit on the rear doors. Oh btw the door has to be shut to lock it, contacts don't contact otherwise.

I tested the wires that are leading to the rear doors, The wires on the truck side of the contact switch have power when I use the locks. So I then super polished the contact switches and shut both doors and tested the door wires and they have no power when I hit the power door lock switches?

So do you think the contact switches are bad?