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03-12-2016, 07:25 PM
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#1 |
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Registered User
Join Date: Dec 2014
Location: Euless, Texas
Posts: 520
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74 C10 Wiper Switch
Wiper switch is a 2 speed with a push for washer pulse. Seems no difference between position 1 and position 2 speed. Is this in switch or motor?
TIA
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1974 Cheyenne 10 LWB Stock 350 W/HEI /TH350/AC/4 BBL Quadrajet Mopar by Birth Chevy by Choice |
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03-12-2016, 07:30 PM
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#2 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: 74 C10 Wiper Switch
The motor.
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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03-12-2016, 09:10 PM
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#3 |
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Registered User
Join Date: Oct 2015
Location: Ottawa, Ontario, Canada
Posts: 769
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Re: 74 C10 Wiper Switch
hatzie has it wright..
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 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bedWas a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change. |
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03-12-2016, 09:30 PM
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#4 |
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Registered User
Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,366
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Re: 74 C10 Wiper Switch
I agree. Although there is also the possibility of a bad connection in the wiring.
On the 1977 & older wiper motors, the switch grounds both the "low" and "high" terminals for low speed operation. It only grounds the "high" terminal for high speed operation. So a bad connection between the switch & motor in the "low" speed circuit will result in the motor running at high speed on both switch settings. |
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05-04-2017, 07:37 PM
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#5 |
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Registered User
Join Date: Dec 2014
Location: Euless, Texas
Posts: 520
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Re: 74 C10 Wiper Switch
Update....While working on temp gauge not working correctly in the last couple of weeks, wipers would not work, yet they did 2 days before. Checked connector on switch and found I knocked it off while checking temp gauge. Reconnected switch, now wipers work as they should. Have a 2 speed wiper and parks correctly. Strange how things work....or don't work.
Guess just a bad connection with switch connector. Thanks to all the replies.
__________________
1974 Cheyenne 10 LWB Stock 350 W/HEI /TH350/AC/4 BBL Quadrajet Mopar by Birth Chevy by Choice |
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05-05-2017, 09:48 AM
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#6 |
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Registered User
Join Date: Jul 2016
Location: Brandon,MS
Posts: 489
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Re: 74 C10 Wiper Switch
You caught a break there!
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