1969 Windshield/Headlight washer operation
Thread Starter
Instructor
Joined: Feb 2007
Posts: 130
Likes: 6
From: Alberta
1969 Windshield/Headlight washer operation
Hey guys I'm a bit embarrassed to admit that it's been so long since I've used my corvette that I forget how the washers system is supposed to work.
I'm just at this point in my restoration now and function testing so I have a few questions if I may.
To engage the washer pump I push the switch in, it slides to the right and the motor turns on at low speed. Should I get four initial shots of washer fluid and then expect the flow to stop? Then every time I temporarily push the switch in with the motor operating, four more shots each time the switch is pushed in?
With the wiper motor operating and the washer pump/plunger NOT operating I can hear a slight clicking noise every 90 degrees and was wondering if this is normal. This noise is more pronounced when the washer is operating so I'm just not sure if all I should hear is the motor operating at this time or if this slight clicking every quarter turn is normal with the washer off.
Thanks, Greg
I'm just at this point in my restoration now and function testing so I have a few questions if I may.
To engage the washer pump I push the switch in, it slides to the right and the motor turns on at low speed. Should I get four initial shots of washer fluid and then expect the flow to stop? Then every time I temporarily push the switch in with the motor operating, four more shots each time the switch is pushed in?
With the wiper motor operating and the washer pump/plunger NOT operating I can hear a slight clicking noise every 90 degrees and was wondering if this is normal. This noise is more pronounced when the washer is operating so I'm just not sure if all I should hear is the motor operating at this time or if this slight clicking every quarter turn is normal with the washer off.
Thanks, Greg
Race Director
Joined: May 2006
Posts: 18,739
Likes: 2,583
It sounds to me like the pump pawl is not engaging the tooth gear after the first 4 shots of fluid. The washer mechanism is supposed to return to a park position even if the wipers themselves continue to operate. Remove the two wires that are entering the plastic cover and remove the cover then reinsert the wires. Turn on the washer and observe how the pawl is pulled out by an electromagnet and starts pulling on the toothed gear.
Racer
Joined: Aug 2013
Posts: 358
Likes: 23
From: Brigantine NJ USA
Greg,
Here is a little info regarding the headlight washer operation, see pictures.
Willcox has a lot of great knowledge regarding wiper/system, maybe he will chime in.
My wiper motor makes quiet a bit of noise while in washer operation and I too wonder if it is operating properly.
Rick
Here is a little info regarding the headlight washer operation, see pictures.
Willcox has a lot of great knowledge regarding wiper/system, maybe he will chime in.
My wiper motor makes quiet a bit of noise while in washer operation and I too wonder if it is operating properly.
Rick
Last edited by RickDett; May 6, 2018 at 08:36 AM.
Thread Starter
Instructor
Joined: Feb 2007
Posts: 130
Likes: 6
From: Alberta
Thanks guys. Well it's taken me a while to get back out to the garage but I managed to today. I took the cover off and everything seems to work normal and I am actually getting way more than four shots of fluid and it does shut off when it has completed it's wash cycle.
However with the wiper motor operating and the washer pump/plunger NOT operating I can still hear a slight clicking noise every 90 degrees and was wondering if this is normal? I removed the three screws to take off the washer pump assembly to look for obvious issues and can't see what is causing this noise. I even removed the plunger and it still makes this noise. Only when I hold back the sliding pivot pin does the noise go away. It's almost like the round lug that follows the four pointed cam on the back side isn't properly following the cam and this is what is causing my noise. Has anyone come across this or is this noise normal???
However with the wiper motor operating and the washer pump/plunger NOT operating I can still hear a slight clicking noise every 90 degrees and was wondering if this is normal? I removed the three screws to take off the washer pump assembly to look for obvious issues and can't see what is causing this noise. I even removed the plunger and it still makes this noise. Only when I hold back the sliding pivot pin does the noise go away. It's almost like the round lug that follows the four pointed cam on the back side isn't properly following the cam and this is what is causing my noise. Has anyone come across this or is this noise normal???
