Need some ideas on this one. My truck has a 3-bank power outlet(2 accessory and 1 cigarette). None of em work, I think my tire pump is to blame as I had some issues with a leaky wheel that nobody seemed to figure out till I could get new rims ordered. Checked the fuses and no popped fuses that I could find, replaced the cigarette lighter socket yesterday to no joy.

Don't have an answer, but will be watching this and hoping for one. My 03 has the same issue, only one working is the one in the back of the console for back seat use. I to have checked fuses with no joy. Thinking back, I was using an air compressor when they quit as well.

I be leave that the power supply comes from the larger relay box first. It has a bunch of master fuses and relays that distribute the power to the fuse box,

Possible heavy draw plugs like these are wired through relays to handle the draw, they are found inside the engine compartment usually in a box dedicated to such, there will be more than one and you may need your vehicle manual to identify which one it is, no book? the net is your friend, type in make and model, year and how to locate !

Did you check the fuses in the engine bay? That's were the cig and other 12v fuses are at on my 06 Silverado.

Yes

"Cigar" fuse is a 15 amp, "aux pwr" fuse is 20 amp, both located in the underhood fuse block. Check for power and ground at each outlet with a test light, check for power by clipping the test light to the negative battery terminal or any good ground and touch the center "button" inside the outlet. Test for ground by clipping test light to battery positive and touching the metal body of the outlet. If you have power and ground then the issue is with whatever you're plugging in to them. If you're missing one or the other, check the connector on the backside of each outlet for power and ground. If you're missing power or ground at the connector, you're going to need access to service information including wiring diagram, like a chiltons manual for example, and some electrical diag skills (not saying you don't have any, for all I know you're an electrical engineer.)

break out the volt meter and follow it backwards.

start at the fuse do you have power to the fuse ?

if you don't have a volt meter , a 12 volt test light. https://www.youtube.com/watch?v=Hlna_kUt7As