Another potential issue could be a blown fuse or fuses, which may result from technicians performing electrical work on your vehicle. Fuses can blow from electricians performing certain electrical tests that can sometimes cause more power flow than usual, overloading the circuits, and we’ve even seen cases where fuses blow simply from technicians disconnecting and reconnecting the 12-volt battery, as a new power supply can send jolts through the system.
Start by inspecting the accessory and constant fuses in the fuse box or add-a-fuses to see if they are blown. Additionally, if your dash cam’s hardwiring kit has inline fuses, inspect them to ensure they haven’t blown. If any fuses are blown, replace them with new ones of the same amperage rating to restore power flow to the dash cam. Fuses are very common items found in most auto repair shops, and often will have their specifications written on their bodies.
When identifying a blown fuse, look for a broken metal wire or a discoloured, cloudy, or melted appearance inside the clear plastic housing. If the metal strip inside the fuse is intact, the fuse is still good; if it's broken or appears burned, the fuse needs to be replaced.