installing a sunvisor monitor

RED ( assuming that this is the ignition wire ** MAKE SURE OF THIS with the install guide ) - will need to be hooked up to the PINK wire at the ignition switch

YELLOW ( assuming that this is the constant wire ...same as above ) - this will go to the RED wire at the ignition harness

BLACK- GROUND

BLUE - might be a remote wire, but try leaving this connection out until you get the other 3 connected and try to turn on the screen. If you get nothing, test to make sure that the BLUE wire doesn't have an output of any sort on there and then try running a jumper wire from the switched ignition wire to the BLUE wire as this will be the same as a remote turn on wire from an aftermarket head unit.