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Re: both cigarette /accessory lighter plugs dont work.
HELLO. FIRST DO YOU KNOW IF YOUR KEY. SHOULD BE ON FOR IT TO WORK.? TRY TURNING THE KEY ON AND SEE WHAT HAPPEN'S.!! IF THAT DON'T WORK TRY LOOKING IN THE FUSE BOX AND IT SHOULD BE THERE AS CIGS/LIGHTER OR CIG/SRAIDO OR LIGTHER/RAIDO OR CIGS/ ACC . IF YOU STILL CAN'T FIND IT THERE HERE IS WHAT YOU CAN DON'T. U NEED TO GET A 12 VOLT DC TESTER. AND TEST THE LIGTHER TO SEE IF IT HAS POWER. THERE CHEP. AT RAIDO SHACK. GIVE IT A TRY . REMBER TO TRY IT WITH THE KEY ON THEN WITH THE KEY OFF. WELL "GOOD LUCK" LET ME KNOW IF THIS HELP'S
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There are actually FIVE cigarette lighter/ Auxilliary Power Outlets shown in the wiring diagrams for your vehicle. The Instrument Panel  Accessory Power Outlet (Cigarette Lighter) is protected by the "LTR" Fuse (# 53 - 20 Amp) in the Power Distribution Center (PDC) in the engine compartment.
The Instrument Panel  Accessory Power Outlet is protected by the "AUX PWR" Fuse (20 Amp) In the Instrument Panel Fuse Block on the left side of the dash.
The Center Seat Accessory Power Outlet and the (two) Center Console Power Outlets are protected by the "AUX PWR 2" Fuse (20 Amp) In the Instrument Panel Fuse Block on the left side of the dash. NOTE: If your vehicle is not equipped with the Center Seat Accessory Power Outlet, or the Custom Floor Console (optional), this fuse position will most likely be empty.
I don't have a solution for this problem(yet) but have the exact same issue with a 2005 Silverado. All fuses are good and the cigarette lighter outlet works fine. I am looking to get my hands on a copy of the wiring diagram for this truck. I suspect that there is an inline fuse somewhere in the system that has blown but haven't been able to locate. If anyone has a copy of the service(or Haynes) manual for this truck, I would appreciate a copy of the wiring diagram that shows the accessory outlet.
check all of your fuses ,a blown fuse might be the problem, the cigarette lighter usually is on the accessories fuse as is your interior courtesy light the fuse box is probably under the bonnet but there may be one under the dash as well....hope this helps ....cheers
The cigarette lighter is controlled by the 15 amp ACC fuse. This same fuse allows the Power Outlet Relay to power up. I would think that this fuse is your issue. Hope this helps, and Thanks for selecting FixYa to solve your question.