ABS light coming on

Glad to assist!

Have the fault codes read. The computer will tell you what it is unhappy with. It would appear the left front is open. I'd measure it right from its connector to verify that, and check those terminals.

Check if your van uses a speedometer cable. My '88 Grand Caravan uses a cable and the speedometer bounces once in a while when it's really cold. My '89 Grand Voyager does not have a cable. The speedometer uses the speed sensor signal and can be expected to develop more problems in its lifetime.

This vehicle is under a recall for the rear axle falling off. Has that been taken care of?

Grinding noises are typical of worn brake linings but the thud has me worried. Ford has a lot of trouble with steering and suspension parts separating leading to loss of control and crashes, so noises must never be ignored. The best bet is to have those systems inspected at a tire and alignment shop.

Can you tell if the noises are coming from in front or in back? If it's in back, according to the recall you're supposed to stop driving the van and have it towed to the dealer.