As I was reading the thread, I was thinking "liftgate harness." Shorts and opens there are responsible for 65.2% of all liftgate electrical weirdness.
Please post your vehicle info in your sig when you are asking for help, especially year when talking electric. For instance, the bit about serial data posted by
@
IBallEngineer
only applies to 1999 and later. On an earlier model, that fail can easily be a short in the harness. What's your year?
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'99 4Runner SR5 5spd 3.4L V6 4WD(U.S), original '99 Talls in front, OME 906s in back, Hella fogs, Trekmaster shocks in front, Billy in back, no running boards, FIAMM horns, Alpine sound, Michelin LTX M/S2's, owned since new.
'97 HiLux SW4 5spd 4WD(Japan model bought in Brazil assembled in Argentina, very close to a 3.0 4Runner/Surf)
'71 FordWillys Jeep CJ5 (with straight six Ford Maverick 3.0 liter engine--lives in the mountains north of Sao Paulo Brazil)
My Backyard Frame Swap
