Author Topic: Washer fluid pump question  (Read 1672 times)

Offline 1911fan

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Washer fluid pump question
« on: May 09, 2018, 07:43:05 PM »
Buddy of mine pulled this off a 78 1 ton. Trying to put it on my 78 3/4 ton. Assume it's an aftermarket? The power supply to the wiper motor is different. Also seems to have an extra plug on the original? Anyway to make this thing work? The original leaks from the washer pump and sprays fluid whenever the wiper motor is running.

Offline VileZambonie

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Re: Washer fluid pump question
« Reply #1 on: May 10, 2018, 06:37:11 AM »
The one in your hand is from a 77 down truck. Just get a reman unit, used ones are hit or miss.
,                           ___ 
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              ⌠ŻŻŻŻŻ'   [☼===☼]
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline ehjorten

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Re: Washer fluid pump question
« Reply #2 on: May 10, 2018, 08:40:32 AM »
You can also just buy a washer pump repair kit, or just a washer pump.
-Erik-
1991 V3500 - Gen V TBI 454, 4L80E, NP205, 14 bolt FF, D60, 8" Lift on 35s
1977 K20 Silverado - 350, THM350, NP203, 14 bolt FF, D44, Stock Lift on 31s
1969 Chevelle Malibu Sport Coupe - EFI350, THM350
1968 Chevrolet Step-side Pickup - 300HP L6

Offline Henry

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Re: Washer fluid pump question
« Reply #3 on: May 10, 2018, 12:46:41 PM »
Hi eh:
The original pump/motor assemblies were supplied by AC Delco division of GM.  The design for the assembly changed a couple of times over the production run of 73-87. I also believe the assembly for a truck with intermittent wipers is different and not interchangeable with one for non-intermittent wipers. This auto parts store called Advance Auto Supply had two styles for my 76 truck and so I had them order both and then took my assembly to the store to compare wiring and fluid ports. One was a AC Delco and the other was aftermarket...I bought the aftermarket as it looked like the original AC Delco that came on the truck(pictures in service manual)...and was cheapest price I could find.
Regards,
Henry