does anyone know where the fuse for the lighter/12v power plugs is on a 2000 Dodge caravan?
Owner’s manual tells you which fuse is which, or pull one at a time and look.
Try honking the horn. The power ports and lighter use the same fuse. If the horn works, there’s nothing wrong with the fuse.
Tester
There are 2 fuses for the power outlet. One fuse is in the junction block, its ptc #7 - 9 amp. The other fuse is in the power distribution center, #4 - 20 amp. There is a relay for the power outlet circuit in the power distribution center.
You need to check your owners manual for locations.