the backup lights are not working - any suggestions? on 1999 Dodge Ram 1500

I replaced bulbs and it worked for a day or two, but has not worked since.

Asked by for the 1999 Dodge Ram 1500
The violet/black wire should have power at the tail lamps when the key is on and reverse is selected that wire goes directly to the reverse light switch at the transmission the brown/light green wire at the reverse light switch .gets power from fuse 7 (10 Amp) in the fuse box. If you have power at the switch put a paper clip across the switch wires if the lights now stay on the switch is bad.
switch is good and bulbs are good it has power to switch remove switch and push in switch bulbs light whats in the manual trans to active the switch