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I recently left my offroad lights on and drained the battery on my 2008 Wrangler. When I charged the battery my radio was doing the exact same thing as yours. In fact I also tried the reset button and the special code access bypasses. What finally worked was disconnecting the battery for 10 minutes and hooking it back up again. I hope that this works. Don
12/29. I actually figured this one out myself after reading posts concerning parking brake over rides. It turns out that the Boss BV9055 will not powerup if the pink parking brake wire from the units wiring harness is not grounded. Once I grounded that pink parking brake wire the unit did power up.
easiest thing first. check the fuse on the hot wire on the radio harness. next, check to ensure the hot wire is to battery power, and the acc (likely yellow or orange) is attached to a wire that turns on with the ignition. next, check to ensure good ground. all this should take less than 10 minutes.
check your ground. have had that before several times. the factor wire that you though was a ground may be bad but in newer cars its usually a very illusive wire to find. next if you ground your radio straight to the frame and it still dosent work work backwards. hook up only your accesory and your constant and the ground wire. if it still dosent work you have a problem and its not cheap. if it does work then you have a grounding wire or your wiring is not hooked up properly. if you have no idea about anything i just said take it to a install shop. more than likly in an 08 liberty they have a factory amp and your amp is drawing to much on your power antenna lead or you have other issues but this is where you start.
Yo, I've got the perfect solution to your problem. Pull out the head unit from your dash. Then, remove the wiring harness carefully from the unit. Now, push in the yellow power wire (even jiggle it a little) making sure it's tightly snug the small port of the wiring harness. Then, plug the harness back into the unit and try turning it on. I've found that the wires come lose easily on this unit. hit me back up at Darkintel74@aol.com.
Ground the parking brake wire to any metal surface that is handy. Just as solution 2 suggests. I accidently clicked the top "Guest" as the best solution when Solution #2 was the one I meant to click on. Ground it and enjoy!