There is a separate 30 amp strip fuse in a cute little black housing outside and forward of the main fuse box. I would start there. May look OK, but if corroded or discolored, probably blown. Requires a phillips screwdriver to remove. Part available here, dirt cheap.
30 Amp Strip Fuse Bosch $0.58
BTW, check the fuse for the climate control system as well.
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.