viper 211 keyless

have you tested that wire in the truck to see if it has 12 volts when the parking lights are on and none when they are off?

also if you didnt buy the unit new, a previous owner might have moved the jumper inside the unit to turn the white wire into a neg trigger for a relay operated system that has more lights than the units internal relay could handle. or they may have used it as a neg output that some cars need to activate the parking lights.

if the unit is new, maybe you have too many lights and the fuse blew... if so then you need to use an external relay to power the lights.

It was bought new, there is power at the b/y wire when the lights are turned on and none when off. It would seem when the remote is used there should be voltage coming thru the white wire to flash the lights but there is not.

When holding the box and sliding the cover down, the fuse is set to the right side.