2011 Tail Light wiring help

[kd3yt]

Installing a rear camera to my 2011 Ranger XLT Supercab 4x4
Every thing is in except when I went to tap the back up light
both wires on the socket are the same color. What is the correct
way to make sure which side is the 12v. Once I determine that
do I just connect both wire to the socket wiring or do I run
the ground to the frame or somewhere on bed.

Thanks. Going to post this is two forums hoping to get a quick answer.

 

[Curious Hound]

If you have an ohm meter, you could remove the bulb and then check to see which wire shows 0 ohms to ground. That would NOT be the power wire. Or, use a volt meter or test light. With key in the run position, but engine not running, put the transmission in reverse and see which wire has 12volts. The ground wire from your camera should go to the frame of the truck. I’m not 100% sure about 2011, but most Rangers have a ground connection on the rear crossmember for the rear light assemblies.

 

[2011Supercab]

According to the wiring diagram book for the 2011 Ranger, They are 2 different colors.

Black/yellow - Ground
Brown/yellow - Positive

 

[kd3yt]

OK, issue resolved. Wires had enough dirt on them they looked the same. I pulled the plug
and used my voltmeter to make sure which one is the 12v. Can't find the ground at the
cross member as my spare tire hoist is froze and can't lower tire so will get the drill
out and bolt the wire directly to frame. Thanks for the replies.
KD3YT