Hey guys,
On my 1971 454, The previous owner had removed the windshield washer unit and covered the hole with electrical tape!! I believe he had space problems working the timing on the distributor.
Not that I ever plan on using it, but it bugged me enough that I purchased a new one and installed it. I have looked at some diagrams but wanted to confirm the following two points.
1. I fond this set of yellow and blue wires being held by a vacuum line and believe they are the lines to the washer pump. The connectors inside fit. Can someone take a look at theirs and confirm the colors on theirs?
2. Can someone confirm that the center nipple goes to the washer fluid bag? i also believe the two top ones are for the wipers and the two bottom ones are for the lights.

As always, much appreciated!

 

I got rid of all that crap on my 1971 and installed an electric pump in the bottom of the fluid tank. Works great. Those wires should go behind the black cover and they just slip into the connection on the pump. You can see where the wires go in your first picture. The little bump out in the cover is where the wires go. I ran these down to my new pump. The pump is a mechanical pump meaning the rotation of the wiper motor runs it. All those wires do is actuate a solenoid the "unlock the pump" as long as your pressing the button on the dash. Yes, the middle is from the reservoir and the others to the WW and lights if equipped. Mine doesn't have headlight washers.

 

The original headlight washer system had a solenoid that was activated when you held the washer switch down. The solenoid had the hose connection to the headlights and the head of the pump had only three ports.
Solenoid

 

So you think these are the right ones also, yellow and blue with one on each side? There has been a bit of DIY done on the car and just wanted to be surish

 

Original wires were black. Somebody spliced something.

 

My wiring diagram and wires show them as light blue and yellow as shown in the picture and I believe that is what is on my car as well. Haven't looked at them since I installed an electric pump.

 

Not looking at wiring diagram. The two wires that activate the washer solenoid are black on my car. Have owned this November 69 build since February 73. Blue and yellow go to wiper motor on my car.

 

Yah I can't find any other ones not in use and these two were not attached to anything. Might do some testing tomorrow. The wiring diagrams I have for 1971s are not conclusive but they show a yellow one branching between the wiper motor and washer.

 

Pump is attached to the wiper motor. I'll post up my wiring diagram when I'm off shift (I work 12 hours and don't have the time when I get home at night). All I know on my '71 the light blue and orange wires went to my old mechanical pump (which worked) before installing an electric pump. I used these wires to power my electric pump and it works great. Not sure Chevy would use just black wires, black is usually reserved for grounds.

 

I finally found a wiring diagram in a Haynes manual with that showed the colors of wires to the washer as yellow and white/Blue.
Thanks guys

 

One of the first things I did after buying a Corvette was to buy the shop manuals for the car. I bought the Haynes, Clymer, and genuine Factory Shop Manual. As of today I only use a Genuine FSM when working on my C3. I threw away the other books and just use the factory manual.

Accuracy is not the best in the aftermarket shop manuals. I used to build air cooled engines for my VW's and one of the manuals told me to put the shims on the end of the crankshaft to set the end play for the crankshaft which goes inside the case. The correct position for the shims is on the outside of the sealed engine case. This required that I completely disassemble the engine and start over. I was not impressed. A Clymer manual was found to be incorrect in the re-assembly of an engine as well.

On the later Corvettes like my C4 have the best shop manuals I know of. They sell you a pair of bound books with one for the mechanical systems and one that contains all the electrical subsystems. They cost about $100 a set but they have the very best troubleshooting systems and color wiring diagrams. For my C3 I have a DocRebuild electrical diagram and a second sheet showing all the electrical connectors so it makes it easier to know what goes where.

My factory windshield wiper still works so I left it alone. 57 years old and it still squirts water like it should. Why complicate things?

 

I just use the wiring diagram in the AIM. It's not color but I work with electrical schematics every day so it's no big deal to me. I won't do business with Dr. Rebuild just because that dude has an attitude and thinks his **** don't stink. I don't care how good his stuff is. When he gave me an attitude over the phone one day I told him I'm your customer and don't give me an attitude he hung up on me. Homey don't play that game.

 

Those two wires plug into the Selonoid and a pair of black wires come out of
the plug and go to the front cover of the motor on my 69. Zip has a picture of
the pair of black wires. Good luck.

 

Windshield and headlight washer pump is working great with the yellow and blue wires for my 1971.
Thanks guys!