Topic: Wiper relay test
in Forum: C3 Electrical, Body and Interior
Already a Member?
Click Here to Login
Not yet a Member?
Click Here to Register for Free!
Lifetime MemberAsh Fork, AZ - USA
Joined: 4/18/2007
Posts: 1058
Vette(s): 1981 Red Interior White exterior
Is there anyway I can test the wiper relay to see if its working properly. I know the wiper motor works I have bench tested it and the wiper switch is brand new. I did check the fuse first.
Dave C..........My mantra: I can not be bought!! Long and short term leases available.
In the words of Zora Arkus-Duntov "Is your seat belt fastened? Alright, Let's go"
Yeah, I know, Shut up Dave.
Yeah, I know, Shut up Dave.
Lifetime Member #192
SPONSOR AD:: (Our Sponsors help support C3VR)
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20225
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Soitanly! 
For the relay(any relay) to work, it must first have 12v anytime the key is on on one of the terminals, usually the one with the largest red wire on it. Next, it must also have a ground to energize the relay. Then, it needs a signal from a source(wiper switch, etc) to command it to be energized. In some cases, this signal is actually the ground for the relay. And lastly, it has to have one wire going out to the component being controlled by the relay. I don't have the wiring diagrams handy right now, or I could specify which terminal on the relay is what. I can look later tho, and find out, unless someone beats me to it(Bob).....
For the relay(any relay) to work, it must first have 12v anytime the key is on on one of the terminals, usually the one with the largest red wire on it. Next, it must also have a ground to energize the relay. Then, it needs a signal from a source(wiper switch, etc) to command it to be energized. In some cases, this signal is actually the ground for the relay. And lastly, it has to have one wire going out to the component being controlled by the relay. I don't have the wiring diagrams handy right now, or I could specify which terminal on the relay is what. I can look later tho, and find out, unless someone beats me to it(Bob).....
Joel Adams
C3VR Lifetime Member #56 
My Link 
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Are you talking about the wiper delay I don't believe their is a basic relay in the wiper circuit?
This is for 1980 which I think is the same
http://www.C3VR.com/member_pages/4201_4300/4221/page-48-Delayed-pulse-wiper---Washer.jpg
|UPDATED|5/21/2014 12:48:25 PM (AZT)|/UPDATED|
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20225
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Ya...I wuz just looking at the wiring diagram...ain't gots no relay for the wiper motor. Just the intermittent wiper module. 
Diagram DOES show a fuse link for the module, tho...very possible that fuse link is blown.
Diagram DOES show a fuse link for the module, tho...very possible that fuse link is blown.
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Lifetime MemberAsh Fork, AZ - USA
Joined: 4/18/2007
Posts: 1058
Vette(s): 1981 Red Interior White exterior
Thanks guys. I ordered the delay relay bypass and it doesn't fit my switch so I'm a little perplexed. When I noticed,my wipers not working I did hear a click coming from the delay relay. Still testing.
Dave C..........My mantra: I can not be bought!! Long and short term leases available.
In the words of Zora Arkus-Duntov "Is your seat belt fastened? Alright, Let's go"
Yeah, I know, Shut up Dave.
Yeah, I know, Shut up Dave.
Lifetime Member #192
Fit into the switch??
Shouldn't that bypass connector take the place of the delay module located in the storage compartment?
GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975
Click here to see more pics of my Vette on CarDomain.
Lifetime Member #26
Borgeson Steering Box
Born 8/1981
Sequence #3975
Click here to see more pics of my Vette on CarDomain.
Lifetime Member #26
Lifetime MemberAsh Fork, AZ - USA
Joined: 4/18/2007
Posts: 1058
Vette(s): 1981 Red Interior White exterior
That's what I thought Darryl, but its not even close. As soon as I get my computer back I can do more research.
Dave C..........My mantra: I can not be bought!! Long and short term leases available.
In the words of Zora Arkus-Duntov "Is your seat belt fastened? Alright, Let's go"
Yeah, I know, Shut up Dave.
Yeah, I know, Shut up Dave.
Lifetime Member #192
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20225
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Got a pic, or a link to the thingy you bought?
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
If you have time next week I could take a look at what you have?? It's up to you.
GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975
Click here to see more pics of my Vette on CarDomain.
Lifetime Member #26
Borgeson Steering Box
Born 8/1981
Sequence #3975
Click here to see more pics of my Vette on CarDomain.
Lifetime Member #26
Lifetime MemberAsh Fork, AZ - USA
Joined: 4/18/2007
Posts: 1058
Vette(s): 1981 Red Interior White exterior
It does plug into the relay, or the back of the relay. I don't have the car here. I'll check it out tomorrow when I get it. Sarge, I'm heading to the 1000 Islands Tuesday morning and will be gone for a week, hopefully. Thanks for the offer. If it's still causing me a problem I'll bring it over after I get it back from Mankos.
Dave C..........My mantra: I can not be bought!! Long and short term leases available.
In the words of Zora Arkus-Duntov "Is your seat belt fastened? Alright, Let's go"
Yeah, I know, Shut up Dave.
Yeah, I know, Shut up Dave.
Lifetime Member #192
in Forum: C3 Electrical, Body and Interior
SPONSOR AD: (Our Sponsors help support C3VR)