My 2002 Blazer, the windshield washer works fine for the back wiper, but for the front wipers, the pump won't even turn on. The front and back use the same pump right? So why won't it work? What should I check?

 

On my 04, there are two separate pumps. One pump is just below the other mounted to the reservoir and is very difficult to see. Mine wouldn’t work
but replacing the pump got it going.

 

Just remembered, I had to take out my air cleaner to get to the pump; I changed them both so I wouldn’t have to go back in there.