headlights on western MVP + won't come on???

[XGARDX]

out preping the plow today.

noticed the low-beam lights on my mvp plus won't come on, on the plow like they should.

i have it on my 2005 gmc sierra 3500. it normally kicks on ( per the day time running low-beams) as soon as i plug the wires together on the harness.

at this point its shutting the lights off on the truck side/ and no low beams on plow, when in daytime mode.

with the lights turned to "ON" in the truck, it cycles on the truck's low beams.

if i flip to "HI beams" though, they cycle on on the plow just fine though???

i had this problem near the end of last season, and messing with a stuff found a fuse for the trucks low beams were burnt out, i check it and they all looked fine.

any ideas where to start???

[Earthscapes]

Start by checking the wiring, if all the wiring is good, then check the relays.
Most likely its a broken wire or a bad relay if the high beams work.

[XGARDX]

checked all the wiring i could see... seems fine. the fuses in the plow wiring looked good. swapped relays around in the truck's fuse box, didnt fix/change anything.

wondering if something can go bad in th ISO module, i hear it doing a "buzz/ kind of click sound from it when i switch the trucks high beams on ( which then turn the lights on the plow on)

[The boys]

Im not a betting man but ill bet the iso mod is gone

[XGARDX]

hmmmmm, anyone in the Cleveland/ Elyria area with a 2003-2007 silverado/ sierra and western ultra mount plow i can try swapping ISO modules with to see if that fixes it?