Automatic Door locks stopped working

[kickinmhl]

I have a 1999 GMC Yukon.

The door locks just stopped working. When I push the switch on the door, there is a clicking noise under the dash, but nothing happens. None of the doors unlock, and none of the switches work.

I am assuming it is not the actuators because they would all have to go out at the same time for this to occur.

Anyone know whats going on or where to start troubleshooting it?

THank you!

 

[YukonJenNV]

I too have a clicking sound coming from under the dash, near the floorboard, center of the dash. The only thing I can see that doesn't work is that the daytime running lights are showing that they are on in the gage cluster, but not actually on at the headlights. Sometimes I hear it clicking like crazy down there when I am driving down the road. Anybody else have these problems?

 

[mygreen98]

sonds like bad relay, or bad ground.