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I am in the process of installing a back up camera on my 05 tundra double cab. I have a video cable running from head unit, a 12v constant power running from head unit, and a reverse remote wire running from reverse trigger switch of my pioneer 4600bt. I ran constant power as the head unit can switch to camera even when not in reverse. I am trying to tap in to my 7 pin connector for the ground comining off of camera and the reverse remote line so I won't have to tap in to my reverse light lines. I have attached a picture of the 7 wires coming out of my connector can someone tell me the reverse and the ground wires. I read that white was ground and purple was reverse but I don't have purple.

This is my first post on here as I am new thanks in advance
 

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You could look at the diagram and check for continuity from the pin for reverse...


 
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That is why you use a multimeter and test the wires for continuity to the terminal.

You can also use a test light and probe the wire and see which one comes on only when the truck is in reverse, not running, with the parking brake on.
 

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Multimeter or test light can be had for less than $10, hell less than $5 at Harbor freight.

PMG
Free multimeter with the coupon they put in the paper, and magazines.

Everyone should have at least one. I have 3. Not the HF one though. They do work at least a few times for the casual diy.


Test lights are also super cheap. I dunno how many I have.
 
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