i have functionally tested the camera connecting it directly to a 12v source so nothing wrong with the camera. And I can get the reverse light to send a signal to change the monitor to say it’s in reverse but can’t get the camera to work unless it’s directly in and on all the time the cars on.

found out you need to use a relay to connect the camera up so I have connected the camera as follow;

relay 30 - direct 12v power

relay 86 - reverse light

relay 87 - camera power wire

relay 85 - grounding

but no luck still nothing comes on when connected

tested the connections the camera power isn’t receiving anything from the relay, unfortunately my multimeter has decide not to work so I’ve just been testing using a circuit light tester

The camera is an Auto-vox cam 1 and connecting it too a pioneer sph-da120
The relay is just a standard 12v 30amp 4 pin

Any advice would be much appreciated.

 

Are you sure your direct 12V into the relay is working?
if 30, 86, 85 are good then 87 will be good unless your relay is bad.

Another possibility, are you sure you have the right type of relay? Some relays are normally open and some are normally closed and switched when energized.

 

if you want to test the relay, try this with it out of car:
12V to 30
12V to 86
GND to 85 (you should hear a click if not relay is bad.)
Now use a test light clipped to ground. Probe 87. It should light.
If it does not light remove the 12V to 86. Does it light now? (if yes then this is the wrong type of relay)
If neither way lights the relay, its bad.