Do these halos stay on when the engine is off, or only when the truck is running?

The halos run anytime your parking lights or low beams are on. They'll draw power from your battery, so turn them off or the factory lights before leaving the truck parked for extended periods.

Will these work with the factory wiring, or do I need to add relays and a separate power supply?

These plug straight into your factory headlight connectors—no relays, no auxiliary wiring needed. The LED draw is light enough for stock harnesses.

Can I return these if they don't fit or the projector pattern doesn't work for my truck?

Return window and process are listed in your order confirmation. Test-fit before fully sealing the headlight to bumper gap, and confirm the beam pattern on a wall before committing to the install.