Turn Signal problems of the 2008 Dodge Caravan

When clicking off my high beams, my wipers came on. I was unable to shut them off. At the same time my high beams, turn signals and rear wiper stopped working. While my front wipers were going non-stop despite being shut off, the washer fluid did not work (front and back). When I took it to my garage I was told the tipm had to be replaced but it was currently on national back order and they didn't know when they could get their hands on one. For the time being I have had to make due with disconnecting the battery for 7-10 minutes and then all systems work again, I am not sure how long this will work for but currently the only option.

On a highway ramp entering the highway the horn on my van started to blow on & off, at the same time the windshield wipers were wiping & the spray was spewing at me at high speed. The lights blinked on and off & the door locks were going up & down. The radio was blasting as well. I came to a stop before entering the highway to try & figure things out but nothing worked. For 5-8 minutes I sat there in fear it would catch on fire. I put in in park, turned it off & took the keys out. It continued to do all the activity with the keys in my hand! when it stopped & I tried to starting it. It started & ran ok till it happened not more than 15 minutes latter on my way to the dealer. This time it lurched forward at a faster speed with everything wiping, blowing, spewing & blinking which caused me to drop it into neutral & brake to a stop in the median. This time when it became quite it wouldn't start again & was towed to the dealer. They saw the codes it left but couldn't determine the cause. They said they could keep it thru the weekend & try again on Monday or I could take it & bring it back when it did it again. This is the car I drive my family in all the time. Myself & 4 young girls plus friends. Although I am thankful to have only had to pay for towing I am very upset that they couldn't find the cause. I am essentially driving a ticking time bomb. This could happen again at any time, anywhere & with a car full of kids! I have said from day 1 that the van had electrical problems & no one took me serious. The only thing the dealer found that raised a red flag was that the windshield wipers come on when you use the turn signal - this has been a chief complaint all along. My family has had Dodges for a long time, have been loyal customers & employees. We expect better from a company we've grown to depend on & refer others to for their next vehicle.