back up camera lights

?

If you have 12V at the backup switch terminals WITH NO load,

AND the voltage drops very low when load (white wire) is connected, there is a high resistance connection to the battery.

do the other items on fuse 12 work?

thanks  will ck lightsw hazard guages this am   radiators have been rewired to run off battery through seperate relay

Check the ground, you may simply be grounding the circuit with the power probe.

well not sure what problem is   all other items on fuse 12 work

\ ran new wire frome fuse panel to switch  works fine

If as per what I've read;

the "G" wire from fuse to switch would be damaged.  enough conductivity to show 12Vs with no current flow.   (usually such damage will burn itself open when load is applied!)

Measure resistance from switch to fuse for both the original and your new wire

You may have a bad connection in the nylon connector by the coolant tanks.

John

ok w new wire all works but passenger bu light is dim  makes me think the problem is beyond the area where the white wire splits to go passenger side  will ck it out this weekend