windshield washer relay

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

78C10BigTen

Full Access Member
Joined
Apr 12, 2017
Posts
15,604
Reaction score
24,050
Location
pennsylvannia
First Name
Ted
Truck Year
1978
Truck Model
C10 BIG TEN
Engine Size
350
Can anyone tell me where the windshield washer relay is and if its bad will it make the washer function not work?
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
29,134
Reaction score
24,068
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
There's two wires at the pump (on the wiper motor). One has ignition power and the other grounds out to make the pump work. Just put a test light between those terminals and push the washer button. Also test for 12 volts on the one terminal. If the light comes on, the pump is bad. If not, it's the switch or possibly the delay module. You can remove the module from the harness, just plug it together without the module in the loop. If the washer still doesn't work, the switch is bad.
 

Forum statistics

Threads
42,192
Posts
911,106
Members
33,687
Latest member
Dale Downes
Top