wiper relay location

Lamby66 · May 10, 2017

My wipers failed working, and I was able to get them repaired via warranty. Just as another member on this this forum, the repair required the replacement of the fuse panel of my truck (2016 sierra SLT with the 6.2 and max tow).

The upfitters manual shows the washer circuit in perfect detail and has two relays (motor and speed).. I figured the relay failed, no biggie. The problem is that the relay is not a plug in relay in the fuse panel like you would expect. I think this is a TERRIBLE design on GMs part

Has anyone replaced their fuse panel on their own outside of warranty and then able to actually keep their damaged fuse panel?

I would like to know where these relays are in this panel and if they are repairable. (I am an electronics technician and can work on soldered on components if that is what this is)

I think these are solid state opto-isolators (which can be TINY!!) If anyone has pictures of the tore apart fuse panel that would be great in case this happens again out of warranty.

Thank you all in advance

Jason Hayes · October 12, 2018

Having this issue which fuse block needs to be replaced under hood passenger side driver side? Is there a relay under the box or no why does the fuse block need to be replaced for this and has anyone ever done this

Lamby66 · October 15, 2018

I did not do the replacement as it was under warranty. They removed the upper part of the fuse box on the drivers side.

There is some circuity in the fuse block and the relay that is pictured in the schematic is actually solid state and not user serviceable. It is inside the fuse block. good news it its not super expensive to replace

GMCustomerService · October 26, 2018

On 10/15/2018 at 10:57 AM, Lamby66 said:

I did not do the replacement as it was under warranty. They removed the upper part of the fuse box on the drivers side.

There is some circuity in the fuse block and the relay that is pictured in the schematic is actually solid state and not user serviceable. It is inside the fuse block. good news it its not super expensive to replace

Hi, Mike. I"m happy to hear your Sierra's wipers are back online. If you have any other concerns/questions, please do not hesitate to reach out to us via private message. Thanks!

Anthony J.

Mike jr · August 21, 2019

My 2017 Silverado is also having wiper issues. I thought it was the blades. When you lift the arms they work fine. Lay them down and they don’t move? Any ideas

Mike jr · August 22, 2019

I have replaced the top of the fuse box as mentioned with the problem not solved. It’s also not the motor , tranny or linkage. Does anyone have any other ideas?

joelperales · December 4, 2020

the relays for the wipers are soldered to the fuse panel circuit. you can test the relays ,If the relays are good then you may have a bad BCM.

mike hughson · March 16, 2021

I have a very similar issue, 2015 Silveraldo, I removed the fuse block and disassembled it and tested which relays belong to the wipers. I think there is at least 2 relays but I can only find continuity between the load side of the wiper fuse and common of 1 relay. I am looking for more info from someone or a link to a wiring schematic or wiring diagram

cameron lucas · July 31, 2023

I just got a 2015 Silverado and the wipers stopped coming on all together, when turn the switch on it turns on the head lights wipers do nothing. would anyone know could this be a relay issue, or the motor just stopped? fuse has power, did not get to investigate farther. any tips or advice would be appreciated.

Lawrence Claflin · December 4, 2023

I am also having wiper issues? I have a 2016 Silverado 1500 WT , I have checked all fuses and I can't find where the relays are? My washer fluid works so what could be the problem? The light on the dash that shows headlights come on when I turn the wipers on but no movement at all? I am confused

mikeyk101 · December 4, 2023

Did you check in the engine compartment fuse block? On my 2016, it shows the wipers are fuse #24 inside the fuse box under the hood. It's located in drivers side rear.

Taken from here: https://www.startmycar.com/chevrolet/silverado-1500/info/fusebox/2016

Edited December 4, 2023 by mikeyk101

Lawrence Claflin · December 7, 2023

I found the wiper relays replaced them both and still no wipes! When turning on the wipers my headlights come on? So now what do I check?

Dakota B · March 15

I started by checking the 30A Fuse No. F52 under hood fuse block. Verified Fuse was good. Decided to grab my bi-directional scan tool and attempt to command the wiper motor and relays on. Relays clicked when requested. Did not hear the motor try to actuate at all. Found that the motor was inoperable and needed replaced.

737mechanic · March 30

I diagnosed the wipers on this 2017 Denali and it is the same as the Silverado and Sierra within at least 2014-2018 and maybe more year's models. The relays are NOT replaceable, so you have to either replace the underhood fuse/relay center or take it apart and de-solder the PCB relay and solder in a new one. Watch both videos to get a good understanding of the circuit and relays and how to repair the fuse/relay box.

Diagnosing and replacing the underhood relay center because wipers did not work.

Can the underhood relay/fuse center be repaired.