My wipers and wiper switch seem to be fine but the pump is running/pumping when the wipers are working.
Now Keep in mind that bubba has taken the yellow wire from both the black plastic driver side cover on the pump and the yellow wire from the harness and spliced in a 17" extension leading over to the top of the AC box on the firewall and reaches next to the Passenger side hood bumper, with a flat female connector at the end and is not hooked up to anything.
Theres a blue green wire connector at the top of the black plastic pump cover that is coming from the same harness as the yellow wire.
NOTE: I'm having a hard time understanding this early 1970 electrical diagram. I did barrow a test meter and figured out that both the blue and the yellow wires going to the pump have 12 volts going to them when I turn the key to ACC and run the wipers.
The reason I know the pump is running is I had the port housing off and saw the piston / plunger working when the wipers were running.
Back to this extension. The closest wire with a single male connector is a green wire next to the AC housing not hooked up to anything. This connector is original connector and comes from a harness at the firewall going to the starter.
I could replace the pump but I would still have this wiring problem.
This was not my project today but now I need to know, it driving me nut's.
Also scared to start hooking up wires that are 38 years old and frying things.
Any advice will be gratefully appreciated.

 

Sounds like you need a new washer pump. The yellow is supposed to be hot with the key on and the dk blue will get grounded when you push the washer switch. The power you are seeing on the dk blue is probably whats feeding through the washer solenoid windings. If you unplug the yellow and or dk blue and the washer still pumps, it's bad.

 

Atkbird; Thank you very much for the pin point problem solver.
Sorry I hadnt responded back to you, but I've had 18 things going on in the last few hours.
Ok I did what you said but before I had rechecked the wires for voltage in the ACC mode and also with the car running.
This shouldnt be a problem just letting you know that in ACC it was reading 12.2volts & with engine running 14.1 volts on both yellow & the dk blue wires. So my guess is that the alternater is putting out ok.
Yes Sir, I disconnected the yellow wire going to the pump and switched on the wipers and yes the dog gone pump was running with the wipers.
Let me see if I understand what your saying about this pump.
First I thought it was weird that both wires the dk blue & yellow had 12 volts on them at the same time. The washer solenoid windings is this like a reostat? Also you say the dk blue will get grounded when I push the washer switch. Does this mean that there is no power going to it untill I push the washer button then it's grounded? Or is it hot then once the button is pushed it will ground & run the pump cycle.
I read in the CSM the pump has a pump cycle.
Sorry for my stupidity, it's just that i'm try to get a better understanding of the electrics on this car, and I'll have a new pump on order tomorrow. Thanks, again.

 

The pump has power all the time the key is on, then when you push the washer switch it grounds the dk blue wire. Yes the pump has a solenoid in it and the windings will act as a resistor. When the dk blue is grounded the windings will create a magnetic field and you should hear a click as the pump gets a mechanical connection the the wiper motor that is rotating. After a couple of wiper motor revolutions the washer mechanism should disengage and the washer should stop. I believe something has gone wrong with that mechanical connection because it is not disengaging like it should even though the circuit is openning as you let off the washer button and interrupt the ground.

No telling what he had hooked up to that wire, might as well trim it back to the added on connection and insulate it well.

 

Many thanks again. Yes Sir I all ready cut it off and spliced the yellow wires together with one of those nice connectors. Also took off the wiper grill and will take pictures of the wiperdoor and wiper actuators and wiper motor and getting all that ready while waiting on the new pump.