I recently purchased a 1987 K5 and I am having a few issues with the wipers.

1. There is very little to no speed variation between the fast and slow settings. could this be the motor having issues?
2. I do not have any delay at all. (Think it is the relay and if it is I can't find any literature or schematics that show the location)
3. The wiper sprayers have been removed completely. I am talking the fluid container/pump/lines/and sprayers. Would I be better off getting an aftermarket generic sprayer with a push button or attempt to redo the old system?
3.5 When redoing the system how do I run the lines under the dash vents?

An help would be great. She runs awesome and I only have a few items to clean up before she is perfect.

Monty

 

The wiper sprayer motor is part of the pump so you only need a container. But the delay slow issue is every blazer I ever had

 

trevin_m, check out the thread (I think on page 2, Full Size K5 Tech) titled "installing new tachometer, by dumptruck1990. I posted a schematic diagram for a 1997 CK-truck for him there. I don't believe the wiper has an external relay, the heater blower motor and the horn do. I have an 83 GMC Jimmy and the wiper settings seem to work ok (for the year). I would look on e-Bay for a replacement motor. I've seen them on there before for around $10 bucks plus shipping. If you're a stickler for originality, try and rebuild the wiper system. It sounds like your already half way home.

 

Here is the schematic: