windshield wiper motor - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gafiredog · 07-03-2024, 05:03 PM

are the windshield wiper motors the same on a 1978 C-30, and a 1986 C-30 ? Will they interchange without any problems? Thanks.

ray_mcavoy · 07-03-2024, 08:17 PM

Yes, the wiper motors should be the same.

The only difference you'll encounter is the windshield washer pump. Sometime around 1985 or so, they changed from a mechanical pump mounted on (and driven by) the wiper motor to an electric pump mounted on the fluid reservoir.

If using the 78 wiper motor in the 86, you can simply leave the mechanical washer pump unused or remove it if desired. If using the 86 motor in the 78, you could transfer the mechanical pump over to the 86 motor, or swap the washer fluid reservoir and do some minor re-wiring to use the electric pump in the 78.

gafiredog · 07-16-2024, 10:50 PM

thanks for the help

07-03-2024, 05:03 PM	#1
gafiredog Registered User Join Date: May 2008 Location: metro Atlanta, Ga. Posts: 196	windshield wiper motor are the windshield wiper motors the same on a 1978 C-30, and a 1986 C-30 ? Will they interchange without any problems? Thanks. __________________ Art 1975 c-10 stepper 1978 single cab dually 1987 crewcab dually 1986 crewcab single wheel 1948 anglia- (the dixie twister super gas)

07-03-2024, 08:17 PM	#2
ray_mcavoy Registered User Join Date: Nov 2009 Location: Sherman, ME Posts: 2,366	Re: windshield wiper motor Yes, the wiper motors should be the same. The only difference you'll encounter is the windshield washer pump. Sometime around 1985 or so, they changed from a mechanical pump mounted on (and driven by) the wiper motor to an electric pump mounted on the fluid reservoir. If using the 78 wiper motor in the 86, you can simply leave the mechanical washer pump unused or remove it if desired. If using the 86 motor in the 78, you could transfer the mechanical pump over to the 86 motor, or swap the washer fluid reservoir and do some minor re-wiring to use the electric pump in the 78.

07-16-2024, 10:50 PM	#3
gafiredog Registered User Join Date: May 2008 Location: metro Atlanta, Ga. Posts: 196	Re: windshield wiper motor thanks for the help __________________ Art 1975 c-10 stepper 1978 single cab dually 1987 crewcab dually 1986 crewcab single wheel 1948 anglia- (the dixie twister super gas)



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