What to do if my Uniden Radar Detector R3 doesn't turn on even though the car is running?
- CCheryl KimAug 16, 2025
First, verify that the power cord is securely connected to the unit and inserted into the cigarette lighter jack. If that doesn't work, change the fuse in the power cord (spare fuse not included). Unscrew the cigarette lighter plug to access the fuse.