Ford Repair Questions? Ask a Mechanic for Answers ASAP
If you plug in the switch and manually operate it by hand without installing it do the lights work?
What yr is your truck.
Do you have a volt meter or test light?
ok with the switch plugged in back probe the light green wire and operate the switch. If you don't get any voltage on this wire when closing the switch and you have constant voltage on the light green/red wire then you just have a defective switch.