I am in need of help. For the longest time now I have been hearing this bang come from the rear of my van. I have taken it to about three mechanics and noone can figure out what the problem is. Of course it is always dry out when the appointment is set to take the van in. They drive it, slam on the brakes, and keep it for about 6 hours. I go back and get charged nothing because they found nothing wrong. Next night I drive it, it rains and BAM, sounds like someone rear-ended me everytime I make a stop. Van runs fine other than that noise.
Last year I was having trouble with my abs light kept coming on. I was driving one night and it was raining. I was going down a hill, and I felt the van slide a bit even after I had applied the brake all the way, and instantly my abs light came on. I turned the van off and the light went out. I started it back up and I continued down the road, and as I stopped at a traffic light I heard a *LOUD BANG* in the rear. It's as if something is slamming into the back of the van. It only does it when you stop so I know it is something to do with the brakes. I was afraid to stop normal again so I gradually slowed down and stopped sooner all the way back home.
Now for the past year i have had this same problem. It is ridiculous. Whatever it is it sounds like my tire is slamming into the body of the van when I stop. It did it last night, and of course it's raining. Any advice would be greatly appreciated. I do think one time I needed a new ABS relay, and that fixed the problem. The mechanic took the old relay apart and it was soaked with water. How water is getting in I have no idea, none of the other relays are wet. PLEASE, PLEASE help if you can.