Supply assembly, brake control power

My car was rear ended, hit and run, and after a terrible body repair job I drove it for a week and discovered inches of water on the spare tire! They had left holes in the tire and storage area I have sealed them off. Now the black box that say Supply assembly break control power is smashed up and taped back together. Can I just order another one used off of eBay, un plug it and plug another one in? This hit and run has been a nightmare for us! Thanks for any help.

 

The body shop took 10 weeks to repair it,allowed to hybrid battery to drain to nothing causing us to have to replace it. Then it stops on me in the middle of town with all types of warnings. I had it towed to my. Machanic and they told me there was water in the back end and got it running. A week later I check and there are several holes where any splash can seep in! Well I have them all siliconed closed but the power box is just hanging in there taped together.i am sure one good bounce and it wlll short out. I am NOT mechanically inclined but if I can order a new one and install it I will feel much better.

 

I had liability coverage, in case I did something wrong expecting if someone hit me they would be responsible. Hit and run took care of that. I might be able to take it back to the body shop, but when we finally after 10 weeks got it back I don't want to turn it back over to them. The holes were along the seams not the ones designed to drain, but the water could be coming from the hatch. There is one seam that is cracked and I need to seal it. Now that I have sealed the seams I will look higher. It is the damaged box that has me scared and I found a used one on eBay but I did not know if I could just un plug the old one and plug it in the replacement. I suppose I would need to take the neg and pos cables off the battery when I did that? Can I run the car day by day with the drain plugs under the tire removed? There was several inches of water there. Right now I have a tarp over the car at night or when it rains. I am lucky to have a second vehicle.LOL reminds me of my motorcycle days!

 

there were several spots where the seam was split. But I have patched them up. And now will check often to see if water is leaking. We love our car and i put 60 to 100 miles a day in it. we found a mechanic that replaced the main battery and in checking out the car fixed brakes and things so now it drives better than ever.

 

Thanks for all your help. I went to a you pull it yard today. The 2 cars they had were pretty picked over.i open the passenger door just to check out the interior and there laying on the floor was the unit! Brought it home and yes it was simple! And it works! Tomorrow I will start on cleaning and checking the hatch. This car is important for us to be able to get around, getting our grandson back and forth to school. We have a drissle in the weather forecast and I will check when I get home to see if I take on water. At least now I know to look! Thanks again for all your help. BTW it was the first time for me to go pull something off of at a auto yard. While I was there I looked for a new dash and seats for my truck but everyone I saw was in the same or worse shape as mine. LOL