Hey when you solve your high beam problems, let me know what the solution was. I've got a Dodge 2000 and the last time I went to hook the plow up, my plow headlights didn't work (low or highbeam). I replaced all the relays ($28!) and cleaned all the electrical connections but still no lights. Finally, with another snow bearing down on us, and another plow with much more serious problems that needed attending to, I just hot wired the lights to the battery and put a toggle switch under the hood to get me by. Worked fine - but I'll need to fix it right. Maybe your thoughts would send me in the right direction. Otherwise, I'm headed to the garage with a multimeter and a wiring schematic.
By the way, if I hadn't found a wiring diagram in my owner's manual, that schematic that was submitted would have been an absolute godsend! The people on this site are the best - always willing to help out a brother landscaper in need!
I use older trucks so I dont know if this is a possibility on you new dodge however, we have had the light problem show its ugly head and it turned out to be the hi/low switch on the floor of the truck. Little $ 5.00 switch can cause no lights because the circuit isnt closed.
Jason,the brown wire that tells the relays to switch, must be hooked up to the running lights or they will not switch.I have found that a bad connection at the tap into the running lights will keep the relays from switching.if you just jump 12v to that wire the relays will click ahd switch.you got reamed on 2 relays-they are about 4.50-5.50 each.
Thanks I'm going to give that brown wire a try - actually I bought 4 relays for $28 (figured I'd just replace all 4 instead of fishing for the bad one) - still reamed at $7 a piece though! This is the same place that charged me $304 to replace the electrical motor on a Western ($140 for the Motor and 160+ for labor!). I could have done it in 10 minutes and got the motor for $80 from J. Thomas Distrib but I had my hands full plowing 2 routes at the time! Thanks again.
The black/orange wire needs to be grounded to energize the relay too.you can ground this at the grille connector,or at the relays,but the brown wire still needs 1V,and ground the black/orange,this will energize the coils in the relays,switching the lights to plow lights from truck lights.