Wiring issues for a snow plow prep ready 2020 Chevy Silverado 1500

[Richard Toomey]

Shortly after purchasing a 2020 Chevy Silverado 1500 with plow prep I had an authorized fisher dealer install a fisher plow frame and wiring harness. A couple months later the truck wouldn’t start, half a dozen error codes. Brought the truck to the dealer to be told they won’t touch it because I had an “aftermarket “ plow setup installed. After much debate they did evaluate it only to blame it on the plow. So the truck was fine for about another month or so then dead battery so back to the dealer only to be told my warranty is void because of aftermarket plow installed by a fisher plow dealership. After much finger pointing it turns out that it actually was the plow in 2020 fisher changed the location of the power feed from under the hood to a fuse panel in the cab. Finally my new truck was working like a new truck until this winter when I hooked up the fisher plow and shortly after I noticed the plow lights and directionals weren’t working but the truck lights/directionals worked fine. Also the plow worked fine too just no lights. Checked the fuses but while inspecting everything I noticed the wires with the mesh casings that goes to each of the headlights was just hanging out no grommets on the headlight buckets no electrical tape just a hole in the headlight bucket?

 Anyone experiencing similar problems? I saw that the 2020 Chevy Silverado 1500 where  having issues with wiring/plow prep wiring? Any help would be appreciated. Thanks Rich 

[Grifdog24]

Just a curious question I know when i purchased mine which had the plow prep package on it.  Well they said it was set but really there was a bag of parts in my back seat storage compartment.  It had some slide in connection studs for on top of the battery and a fuse as well.  Did they happen to use those or one of there own kits?  Where had they wired under the hood oh plus there was another wire connector harness in there for the altenator as well with a wire that connects to the solnoid so that when you lift the blade your lights don't dim?

 

[Richard Toomey]

I had the same exact problem after several trips to dealer /fisher plow installer the small red wire into the fuse box under the hood needs to be run into the fuse box inside can on passenger side, fisher changed location but didn’t tell distributors. Also that BS about aftermarket plow Chevy doesn’t make one , went through that BS also . 
Hope your already all set by now!

[Richard Toomey]

Not sure about the parts but after relocating the wire plow has been fine except the module where everything plugs into underneath the hood the plugs need to be on the bottom otherwise water will sit in pocket where the plugs are and rot out the connection pins . They did that to mine and had to replace harness and module 

[Ryan F]

On 6/12/2022 at 1:42 PM, Richard Toomey said:

Not sure about the parts but after relocating the wire plow has been fine except the module where everything plugs into underneath the hood the plugs need to be on the bottom otherwise water will sit in pocket where the plugs are and rot out the connection pins . They did that to mine and had to replace harness and module 

Any way you could post pictures of the harness that connects to the headlights for the plow controller with the orange wire. (Plow up fitter kit)

Edited November 30, 2023 by Ryan F