Quote:
Originally Posted by Satcho
... 2. Wireless transmitter connected to reverse positive (blue yellow wire) and reverse negative (brown wire); plugged into backup camera and connected to the "Red" and "Yellow" RCAs that bridge between the backup camera and the wireless transmitter; since it is illuminated when vehicle is placed in reverse, I conclude all is appropriate
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That may be an incorrect conclusion - the reverse positive on some X5s (all X5s?) is a pulse-width modulated signal from the LCM module and not a good source of power for reverse cameras (or transmitters). You need a steady +12v source and a relay triggered by the reverse positive PWM signal to power the camera/transmitter.
But... that may be only one of your issues - the camera testing methods you describe indicate both a faulty input on the Avin unit plus multiple dead cameras - which seems rather unlikely.
