I want to install some heavy fog lights on the back of my 4runner, toggled by a relay under the hood. Does anyone know where I can splice / tap a wire for the reverse lights (that ISNT tapping all the way from the tailgate light wire) ?

 

Reverse light switch on transmission??

 

Ok. That is probably the easiest one. I was thinking about in / near that harness by the driver's speaker. The transmission wire itself is actually probably easier to splice and run straight up under the hood. Thank you.

 

+1 on Reverse switch on tranny.

 

Fog lights on the back of the vehicle interesting

One learns new things all the time

I install extra back up lights because of all the backing I do at night.

Then maybe you were using the term Fog Lights in a manner I have yet to discover

 

I think he's re-purposing readily-available fog lights to use as slaves to backup light.
RE: Rear fog lamps... they're used in some places like Europe for enhanced visibility in fog.. Red lights about same intensity as brake lights and mounted in much lower location, usually on driver's side.
We might notice them on many $-Wagons... errr.... G-Wagons