windshield washer pump-rear

i have a 96 blazer lt and when i push the rear wiper button, the wiper works but when i hold it in no fluid comes.... i dont even here the pump turn on. fluid is full....
so i was wondering if there was fuse for the pump alone and not the wiper i dont know about and also where the pump is located for the rear..
thanks

The pump is in the washer bottle. If you look close, there are two. The upper is for the rear. You might want to have someone listen under the hood when you operate the rear washer to see if the pump is working. The hoses have a bad habit of coming undone under the rear floor and inside the tailgate. Usually you will see washer fluid leaking out the back of the vehicle.