Windshield Washer Pump Question

[RickToro]

Not getting any voltage to the pump. Pump is good when connected directly to 12v. My first thought was the multi-function (MFS)steering column switch. However, there is no water to the rear window either. If the MFS was bad wouldn't the rear window washer at least work? I know the same pump washes both the windshield and rear window but isn't there a separate switch for the rear window or does both the front and rear washers go through the MFS? There is a separate button on the dash for the rear washer just not sure whether it goes through the MFS. Do you guys have any experience with this? Also, if it is the MFS, where is the best place to order it from? Thanks

 

[RickToro]

Another question.

After doing a search, one of the threads mentioned there are relays for the washers under the hood next to the frame rail. Can anyone be more specific as to the location and what they look like?