Where to tap into on taillights for turn signal?

[asianman35]

I have these OPT7 running board lights installed, and wanted to see how the turn signal lights would look. but I have no idea which wire to tap into on the taillights to give them power when turn signal is on. Anyone know?

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[Runaway Tractor]

Does not exist. There is only combination brake/turn on the tail lights. Maybe use the mirror signal wire?

 

[Bwanapete]

I would tap into the wires that run to the trailer lighting socket.

 

[asianman35]

I would tap into the wires that run to the trailer lighting socket.

any idea which one of those wires would be turn signals? i assume there would be one for left and one for right

 

[Bwanapete]

any idea which one of those wires would be turn signals? i assume there would be one for left and one for right

Left, right, running lights, ground. I would find a trailer and jump from trailer to truck, one pin at a time, til you find the one for trailer running lights.

 

[bmwhitetx]

I think it will still light up on braking. Can’t get turn signal only.

 

[Zprime29]

Keep in mind that if the truck detects a load on the trailer harness wiring, it will disable rear safety sensors and display "towing" range. At least it did with the y harness I used that came with the led lightbar I tried to use.

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