Have a 2007 chevy 2500 and cant find the auxilary fuse. this is the 12 volt plug next to the cigarette lighter.

Most 12 volt outlets/plugs like one would plug a GPS into or a cigarette lighter, are 'hot' all the time. This means that they are hooked direct to positive side of the electrical system. If your cigarette lighter is not working check the wire from it to the hot side of the fuse block.
patrick

blown fuse i would say if you havnt burnt out cig lighter unit

did you check all the fuses, some lighters are labeled under auxilary power,

You mean there seems to be no power to the vehicle's lighter unit outlet.

This lighter unit outlet is normally wired through its own fuse so check the fuse panel in the car for a blown fuse. If blown it must be replaced with a fuse of the correct amperage. The owner's manual will show you where the fuse is located.

Before you check the fuse just check the cigarette lighter outlet with another plug-in device if you have one such as a portable 12 volt tire compressor or a 12 volt plug-in auxiliary light. It could be that if you are using a charger from the outlet, the charger plug or wiring may be faulty rather than the car's power outlet itself. (These outlets don't usually give trouble unless the wiring has been messed with or the outlet itself has been damaged or abused).

If no device works from the lighter power outlet check the fuse as it may be blown.

Sean
Voluntary contributor.

it wil be located in the fuse box, the fuses should be listed on the box or inside the box and again in your owners manual. If you can not locate this way you will need to pull each fuse till you find the burnt fuse replacing with the same amperage fuse. Cigarette lighters can and do go bad, if you find no burnt fuses the lighter can be bad. This can be checked with any 12 volt plug accessory. Good luck.

Is there power going to the fuse?

read the fuse schematic. If you have a 12 volt test light you can test a fuse

Hello;
The fuse box is under the drivers side dah, on the firewall. Not sure about the cigarette adaptor but the fuses are marked as to what they go to. Hope this helps and please rate me;
Thanks
Rich
RPM Northwest

Most likely just replace it. You could pull the fuse and then use a small screwdriver to try and pull the tabs inside the receiver in toward the center a little. It could be that repeated insertion and extraction of the lighter or accessory plug has bent them outward enough that they're not making sufficient contact to power what you plug in. If that doesn't work, replace it and then put the fuse back in.