How many amps does an older Western plow pump typically pull?
I was going to wire in some fuses for my plow and did not want to put too small of fuse in circuit and get stuck out plowing.
Vintage Western plow with cable 4 way controller, likely from late 80's early 90's. I read they pull 120A at beginning of cycle then it drops to 30A, if so a 150A slow blow should do the trick and I have those on hand. Currently have a 175A main on truck and it does not pop.
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sold my 88's (had 2, one yours, and one Comanche)
sold in 2000 year, ran hard and over 250k miles each.
the answer is the same,as all cars, for sure..
you have an added relay for lights.(aux)
this relay prevents overloading the cars H/L wiring and fusing
so there are 2 parts, there, a relay and a fuse inline added.
the fuses are are for fire safety. (the battery can do 500+ amps ok?)
Relay mounted somewhere, and...
the coil pin 1, ground. car body ground is ok.
then the relay coil 2 wire to the H/L low beam wire,or tail light wire using and inline 5amp fuse , to protect that very expensive H?L switch in that jeep,
tail lamp wire also means PARKING lamps. TODAY.
Contactors are those switch part of relay not the coil.
then contactor, power in pin to one more fuse, 15amp to battery +
and each contactor out to your plow lights. (load)
the when H/L are on the relay closes and the Plow lights work
if you google this there are zillions of wiring diagrams for this
even 4wd offroad light bars wired the same way.
there you go, how to wire AUX lights on any vehicle.
check the wiring connections on the plow solenoids to be sure they are correct, the second step is check the controller box, using a continuity check via multimeter set for DC voltage. I have an old western plow that had similar symptoms, and was the controller box.
Hello! The wire from Fuse #21 (Dark Blue/Orange) that goes to the Digital Transmission Range (DTR) selector is branched to another fuse (#20- 5A) (Dark Blue /Orange) which powers the 4 Wheel Air suspension Module...On the opposite side of Fuse #20 the wire color to the 4-WASM changes color to Red/Black... It is literally two fuses in series... Pull Fuse #20 and disable the 4-WASM and see if the fault leaves..If it does The problem exists in the branch... The air suspension control module is mounted in the passenger compartment inside the instrument panel above the radio and temperature controls...And MAY be wet from a compartment leak allowing rain to drip on the module...Saailer
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