#1  
Old 02-25-2024, 04:13 PM
grd777 grd777 is offline
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Default wiper squirting wont shut off

when i turn my wiper switch on the squiters wont shut off on my 72 formula .it was fine before a parked the car for the winter , tried another switch and the wiper motor and pump are new

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Old 02-26-2024, 08:24 PM
grd777 grd777 is offline
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Originally Posted by grd777 View Post
when i turn my wiper switch on the squiters wont shut off on my 72 formula .it was fine before a parked the car for the winter , tried another switch and the wiper motor and pump are new
Tried another switch same issue

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Old 02-26-2024, 09:10 PM
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Stuck pump 🤔

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Old 02-26-2024, 10:29 PM
grd777 grd777 is offline
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Stuck pump 🤔
I will disconnect and see what happens thanks for your reply

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Old 02-26-2024, 11:06 PM
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The pump is activated by a metal arm that engages in the nylon gear under the pump housing. A broken nylon cam gear, or stiff dried up grease, spring coming off the arm, will make it malfunction, and not stop running the pump. There are a lot of small parts under that cover, many made from nylon that used to break even when the cars were under 10 years old. From your description it sound like the white cogged gear may have broken off one of the pawls that stop it after one cycle. The gear is about an inch in diameter, and last I knew wasn't available seperately.

Back when these cars were used daily drivers, repairing the pumps, and the mechanism that drives them was fairly expensive. Even after spending a good sum of money on the repairs, they sometimes still failed to work as they were designed.

The aftermarket sold washer pumps that retrofitted the troublesome GM design, and were installed inline in the washer hose. They didn't run a full cycle and empty the washer reservoir prematurely, they only ran while the washer button was depressed. GM defaulted eventually to this style of pump after decades of using the failure prone design. It cost about 1/2 as much to buy the aftermarket pump as the GM style did.

If your car is a judged original show car then you might want to refurbish the OEM pump. If it's a driver you might want to consider the rotary aftermarket style.

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Old 02-27-2024, 06:56 AM
grd777 grd777 is offline
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Quote:
Originally Posted by Sirrotica View Post
The pump is activated by a metal arm that engages in the nylon gear under the pump housing. A broken nylon cam gear, or stiff dried up grease, spring coming off the arm, will make it malfunction, and not stop running the pump. There are a lot of small parts under that cover, many made from nylon that used to break even when the cars were under 10 years old. From your description it sound like the white cogged gear may have broken off one of the pawls that stop it after one cycle. The gear is about an inch in diameter, and last I knew wasn't available seperately.

Back when these cars were used daily drivers, repairing the pumps, and the mechanism that drives them was fairly expensive. Even after spending a good sum of money on the repairs, they sometimes still failed to work as they were designed.

The aftermarket sold washer pumps that retrofitted the troublesome GM design, and were installed inline in the washer hose. They didn't run a full cycle and empty the washer reservoir prematurely, they only ran while the washer button was depressed. GM defaulted eventually to this style of pump after decades of using the failure prone design. It cost about 1/2 as much to buy the aftermarket pump as the GM style did.

If your car is a judged original show car then you might want to refurbish the OEM pump. If it's a driver you might want to consider the rotary aftermarket style.
I replaced it last year with a new one the car has been sitting for the winter and was working fine before that. Will check it out

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Old 02-27-2024, 09:42 AM
Red80TA Red80TA is offline
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Add a pic

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Old 02-27-2024, 12:16 PM
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unruhjonny unruhjonny is online now
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as mentioned it's not the switch;
It's the pump on your firewall.

Unplug the power to your pump on the firewall and it will stop squirting.

If your car is a non-recessed wiper car, the pump is shared between older trucks.

I had this exact issue when I daily drove my car.

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Old 02-27-2024, 01:59 PM
grd777 grd777 is offline
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Quote:
Originally Posted by unruhjonny View Post
as mentioned it's not the switch;
It's the pump on your firewall.

Unplug the power to your pump on the firewall and it will stop squirting.

If your car is a non-recessed wiper car, the pump is shared between older trucks.

I had this exact issue when I daily drove my car.
Yes it has the hidden wipers .will start to trouble shoot at the pump

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