G-am you know me too well, been waiting for the first f-er to be tailgating me at night or not laying off his brights, but doncha know once I had the rear light on the rig they have all seemed to behave!
Thanks goo, I tried but picturetrail (recommended by other members) wasn't obeying me with your instructions, I owe you one. Other photos (truck is dirty, please forgive me, I had promised to post this weekend):
http://www.picturetrail.com/gallery/view?p=999&gid=785968&uid=540313
including a daytime shot of the rear lights to show location better. The lights are KC rear lights, which I got because they use a "flood" lens and they are relatively low profile. Wiring is a two relay job, pretty much following the diagram that Jason P sets forth on his web site under "rear lights" topic:
http://users2.ev1.net/~jpendlum/
The wire we Avy owners need to tap into in the EC is light green and in the 1st column on the left, third spot up from the bottom, in the red block - that is the backup light wire - or pull it right from the trailer wiring harness if you prefer. As for location of the lights and the hassle, etc., I pretty much spelled it out - off topic, of course ?

- in a few posts on the "sail accessories" topic, I said
Tim - I just put the rear facing lights on, just under the rear ledge of the roof - the cladding is attached by double faced sticky tape on the top - roof side (so don't mess with that), but underside you just take out the screw on either side and then pull up while gripping the edges that burrow into the rubber on top of the window - the retaining clips slide out and free up the piece somewhat. Well, you will see that just like other areas of the Av there is no metal directly beneath the cladding - I drilled the holes to mount the light brackets about 1/2" up from the bottom edge (drill holes after reattaching the cladding first - look at the area underneath in question while you have the cladding detached to see the small, flat "target area" of metal in question), hole location is 1/2" up from the botom edge of the cladding, in line with where the interior center top window trim piece ends and mates with the two sides (you pull the center interior piece off first to do this job, and remove the window retaining clamp units, fairly easy (remove the two bolts for each clamp unit, and then the clamp unit tilts out from the top side, use a little pry to get it to go) - this then gives you access into the area). But you need to solve for the fact that the cladding is 3/4" away from the metal where you need to bolt down the light brackets - I cut some pieces of 3/4" plywood as backer on either side- worked out great. I'll post pictures soon for you. ?
And while you have the trim piece and clamps off, pull the wiring through the rubber grommet that other wires (for the cargo box lights, I think) come through, this grommet is located not too far from the window clamp unit on the passenger side of the truck. Then run the wires down the pass side door trim that covers the seat belt retractor, then under the step trim, etc.
I think that covers it.