i bought a system from a friend and in the box there was a camera its a nd-bc1
i didnt get the power supply box my friend said it plugs directly in the head unit
i took the insulation off a bit and there is 4 wires
black goes to the shield
white goes to white and shield together
red goes to red and
yellow to yellow
my questions does anybody know if inside the power supply is there resistor or ics or is it just a adapter to change it to rca and power cause to me red would be 12v. yellow is video out and white and black are gnd black to power cam and white is neg signal
any help would be appreciated thanks