Question about 2008 Ford F-350
Battery goes dead sense I have plowed a couple of times and sense then my battery goes dead with my plow on or off
Check all battery cells to see if specific gravity in each cell is nearly the same. Check charging voltage (about 14 volts). Make sure something is not left on.
Posted on Mar 31, 2014
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Posted on Jan 02, 2017
After you check out the motor follow this path.
You should have either a + or - wire going to the switch. From the switch you should have a wire going to the + or - connector [depending on which way you wired the switch] on the relay coil.
This does not have to be a heavy wire, 16 ga is more than enough.
Most relays have a diagram on the case. The coil is usually pictured with a squiggly line through it and the two numbers located at each end correspond to the coil posts you need to hook to.Look for polarity marks, if you don't see any the coil proably isn't polarity sensitive.
Coonect the wire from the switch to one of the coil posts [depending on how you wired you switch] and either a constantly hot 12v wire to the other coil post or a wire that runs to ground [one advantage to wiring the switch - is that it can be easier to polish a bare spot under the dash and using a self drilling screw fasten a ground wire, than finding a hot wire to tie into.]
Wire the coil [to polarity marks if shown] and flip the switch, if you don't hear the relay click then reverse the wires, if you still don't hear it click, replace the relay.Good rule of thumb is to obtain a relay with at least 20% more amp capacity than what the motor pulls.
There are probably 3 other posts in the diagram all numbered.
In the diagram one shows a line from the number only post to a post with a number and letter[that's normally closed] the other shows no line to it[that's normally open].
Connect the motor to the normally open post.and connect a constantly hot 12 volt 12 ga wire[Or what is recommended by the lift maker] to the post that is numbered only..
Do it one step at a time and you'll know your wiring is correct and the thing should be working.
Posted on Jan 06, 2009
first thing i would check is the wiring were the plow wiring is spliced in at this is most likly the culprate. or you may have a bad multi function switch in the steering column
Posted on Jan 02, 2010
The heavy + should be connected to the battery through the solenoid for the motor. There should be wires to control the solenoid (an electric switch, you know). The - goes to the truck's frame at a place of your choice. The ground must be solid, you know that, right?
I think if I were doing this install, I would hook the plow ground with the battery ground on the fame or where ever it is located.
The plow control should be mounted for your convenience inside the cab.
Lets review: Plow motor | ground to ground, hot to solenoid (motor side) | solenoid (battery side) to battery | solenoid control wires to cab.
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Posted on Jan 02, 2010
I would suspect you have something on that is drawing the power from the battery. Check, dome, under-hood, trunk, glove box, and curtorsey lights. If none of them are on suspect a stuck relay especially the one you hear chattering.
Posted on Nov 16, 2010
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