Harness From Trailer
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 Trailer Light Cable Wiring Harness 14 Gauge 100 Wire Roll Yellow Camper Trailer  US $21.95
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 Trailer Light Cable Wiring Harness 14 Gauge 100 Wire Roll White Camper Trailer US $21.95
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 Trailer Light Cable Wiring Harness 14 Gauge 100 Wire Roll RED Camper Trailer US $21.95
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 Trailer Light Cable Wiring Harness 14 Gauge 100 Wire Roll Green Camper Trailer US $21.95
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 Trailer Light Cable Wiring Harness 14 Gauge 100 Wire Roll Brown Camper Trailer US $21.95
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 Trailer Light Cable Wiring Harness 14 Gauge 100 Wire Roll Blue Camper Trailer US $21.95
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 Trailer Light Cable Wiring Harness 14 Gauge 100 Wire Roll Black Camper Trailer US $21.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 03 06 Avalanche US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 09 11 Kia Borrego US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 03 06 Yukon XL US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 00 02 Tahoe US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 03 06 Suburban US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 03 06 GMC Sierra US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 03 06 GMC Yukon US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 09 11 Ford E 450 US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 03 06 Escalade US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 2007 Silverado US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRE 05 07 Hummer H2 SUT US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRE 07 09 Chrysler Aspen US $158.95
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 TEKONSHA P3 BRAKE CONTROLLER WIRING 08 11 Ford F 250 US $158.95
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2006,07,08 RAV4 TRAILER WIRING HARNESS?
I've read that some folks use a cigarette lighter adapter, and plug into the rear adapter to power the wiring harness. This is instead of running the hot (power wire) directly from the battery...This certainly seems like an easier way to install. What are the cons if any on using the lighter adapter to power the harness? One last dumb question, the lighter adapter requires a positive an negative wire. I know the positive is the power wire, is the negative the white wire that I would ground with an ordinary install using direct batter power?
I would not do this as a permanent solution. My experience is those adapters often fall out, and since it's in the rear, you'd never see it to know if you'd lost your lights. It sounds like you are wiring up just a simple 4-wire light system and not a 7-pin style with aux power and brake power, so I assume you are towing a very light trailer. The Rav4 manual recommends Trailer Brakes with anything over 600lbs (very conservative,sounds to me). Be aware if you have a heavy trailer, you really need to use a trailer equipped with trailer brakes and install a more robust wiring system properly and have an electronic control unit at the dash.
If you are not totally experienced with trailering, get some tips from an experienced friend, visit a hitch shop, or do LOTS of on-line study. It is not terribly hard, but there are a number of hitch, weight, and wiring issues to understand so you are totally safe and don't damage the trailer, your vehicle, or the trailer contents.
In two-wire power, red is usually positive, and black is usually ground. If your colors are red/white, then red is power (+), white is ground (-). Keep in mind you also have to tap into your brake and turn signals to have working signals. If your car has the Tow-prep package, you can get a kit from Toyota that will just plug into your harness and you are done.
Another option, better than a cig. adapter, is to splice into the lighter's power at the wire, then run it back to the rear tailgate where you need it. Much more reliable and safer than loose wires through the cargo or passenger area. Just run the wire under the carpeting - very easy to tuck it under there.
