Recently when I go over railroad tracks or rough washboard road, my abs and brake warning light will come on. If I shut the truck off they go off and stay off untill I hit more rough road. This problem began when I replaced the rear shocks. I've replaced the front brake pads because I knew they were getting worn out. Has anyone else seen this?

 

Check and clean the electrical connector that goes to the sensor on top of the rear end. If that does not help, replace the sensor. Also make sure the brake line running along side the gas tank does not have a pin hole in it.

 

Make sure you put thr right fliuld in it. I just went through the same thing by putting power steering fluid into the brake master. I vas very lucky as all they had to do bas change the cylinder with a complete flush and I didn't hurt anythig else.