Wipers won't turn off

Basically the horn relay engages and won't disengage, even with the horn switch removed from the circuit (yes I took off hte steering wheel). And the windshield wipers will come on without the switch actuated. Oh and when the horn relay is removed the accessory plug (cigar lighter) in the dashboard doesn't work. Now having taken my vehicle to a mechanic he told me that the fuse box needs to be replaced and reprogrammed. Knowing that there are 2 "fuse boxes) I neeed the part numbers for the Power Distribution Center and the under the dash Junction Block purly because this man is telling me that a used, junk yard pull fuse box is $175 and a new one is $489. Those prices sound to me like he is replacing the ECM. Your thoughts?

Headlights were coming on during the night and draining the battery. When we figured this out we started pulling out the headlight fuses after parking. This worked for a couple weeks. We bought a new battery and planned a six hour drive. We got a few miles down the road when the wipers would not turn off, and the seat belt light came on. Stopped at a gas station, we turned the van off and removed the key. Headlights and wipers remained on. Then suddenly they went off and a minute or so later came back on. All without prompting and vehicle still parked with engine off. I bought this just over a year ago and have had a tune up done and been faithful about oil changes etc. The maintenance required light came on months ago, but I was told that it just needed to be reset. Any help is greatly appreciated. I need to get my kids to school and sports and have little other options to do so.

Electrical problem
2005 Dodge Caravan 6 cyl Front Wheel Drive Automatic 135000 miles

Last night out of the blue my wipers came on at low speed. I could still change the speed of the wipers but could not stop them. I pulled over and pulled the fuze to stop them. I tried installing the fuze this morning to see if anything changed and it did not. I also had a small red dot flashing in the dash for some period of time. What might be the problem?

2001 Dodge Grand Caravan Sport. At first the windshield wipers would turn on and off (even squirting the windshield). Then several hours later, headlights turned off and back on, then radio shut off and on, then headlights and horn continuously shut off and on, as if panic button had been pressed. Had to disconnect battery as shutting car off did not solve problem. Next day took it to a mechanic, van did not show any problems, he could not find anything. Next morning same problems with headlights and horn, except horn only beeped 3/4 times and shutting car off stopped lights from flashing.

Electrical problem
1998 Dodge Caravan 6 cyl Front Wheel Drive Automatic

The lights and winshield wipers wont turn off. I have to disconnect the battery for them to go off. As soon as the battery is connected they come back o. Thanks, Leroy

Wipers and singal lights wont shut off in a 2010 dodge grand caravan