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Well,I put the plow on the Cherokee, today, I guess I was bored, anyway, hooked it up, when up and down fine, cleaned it, even though it was in the garage, went to take it off and it won't go down. Turns left and right but wont go down. When I press the down arrow on the Electo-touch pad the red over heat light goes on. Any Idea what to do, the manual said the "A" coil may be jammed in the close possion, or no current to the 'A' coil black wire. What wire are they talking about. Any help would be helpfull. I can't use the truck until I find out how to lower the plow... Thanks, Steve
 

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Lets start off first with what kind of plow is it? Did you check your connections to make sure you have contact?
 

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If you put 12 volts to the A coil on the pump, the plow will drop. The A coil is on the back of the pump in the base, and has a black wire going to it. You need a new A coil. When you put 12 volts to it, stand clear.

Now, if it is the square A coil, it is most likely melted onto the valve stem, and you will need a new valve too. This is because you will destroy the valve getting the coil off, but there is no other way.

You can use a floor jack to raise the plow, unchain it, and lower it more onto blocks tall enough to get the jack out, then just move the truck forward or backward and let the plow drop to the ground off the blocks. Then bring me your pump and I will change the A coil/valve, and go over it.

You can also use the floor jack to support the plow before you put 12 volts to the coil, then push the lift arm down manually.

The touchpad senses an overload, and locks out. Often the coil will work enough to drop the plow one more time by putting 12 volts to it. You can use a jumper cable. Hook one end to the bullet connector off the A coil wire, and touch it to the battery +. Either stand clear, or use a jack to hold it up.

One more question, does the plow work when the key is not on, or do you have to start the truck/turn the key on for it to work?

~Chuck
 

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Discussion Starter #4
Thanks Chuck, the plow only works when the truck is on. the plow is a tm 6.5 with a E-57 pump, and its 4 years old. It is normal for this to go this fast, it worked fine when I put it on up and down several time until of course i wanted take it off. I want to have you service the plow anyway Chuck so if I get it off I would like to bring the whole thing to you. If possible can I bring it to you next week.
 

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Discussion Starter #5
Do I put the positive cable from the Jumper cables to the black wire that on the base of the pump. I tryed that and I got a lot of sparkes, somethings not right. Just so I get It, do I put the jumper cables onmy truck battery just like I would if i was jumping a car, both pos and neg,then put the other end of the positive on the black wire on the base of the pump. ...
 

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Do I put the positive cable from the Jumper cables to the black wire that on the base of the pump. I tryed that and I got a lot of sparkes, somethings not right. Just so I get It, do I put the jumper cables onmy truck battery just like I would if i was jumping a car, both pos and neg,then put the other end of the positive on the black wire on the base of the pump. ...
No, you will see a small (16 gauge) wire coming off the coil on the base of the pump in the back. It will be plugged into the harness. UNPLUG it, and connect the positive jumper cable to bullet connector on the end of it. Make sure it can't touch a ground anywhere. THEN walk around to the battery, standing on the side of the Jeep, and tap the other end against the +. Tap it a few times, and the plow should drop each time. No need to hook up the ground, the pump is grounded.

Sounds like you touched the ground (large wire 6 gauge) on the base of the unit, and got the sparks.

Common, yes if it is a square coil. Nothing but trouble with them. I tossed my brother's last year before he had any problems.

Common yes, if the plow controller is hooked up to constant power. It overheats the coil when in "Float". It is VERY IMPORTANT that the controller be hooked up to "key on" power. Which is why I asked above.

Nest week is fine, pick a day.

If it does not drop, then the coil is totally cooked, or the valve is stuck. In that case, drive it up here.

~Chuck
 

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Well it was the SQUARE A Coil. It was DOA. Thank God it wasn't melted onto the Valve stem. I put on a round one, and all is well. Changed the fluid in the pump, and flushed the angle rams while it was here.

I gotta say this is by far the cleanest 4 year old plow I have ever seen.

~Chuck
 
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