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Old 01-05-2014, 05:32 PM   #1
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Did something dumb today

I was jumping off my mower with my jeep today. I accidentally touch the positive cable while on the battery to the jeep and it sparked. Now no power at all. I am assuming I blew some type of fuse or relay. Check the fuse in the box under hood by the battery all seemed ok. Can anyone tell me where to check or what I might have done. I have a 99 Jeep.

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Old 01-05-2014, 06:00 PM   #2
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More specific exactly where was the cable end connected when you touched the other end to the jeep frame or engine

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Old 01-05-2014, 06:18 PM   #3
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Check for 12 volts at the lug under the little snap-off protective cover located at the very rear of the power distribution center, at the end closest to the battery. That lug is where power from the battery enters the PDC. If power is on that lug, there is likely a blown fuse inside the PDC. If no power is at that lug, you probably have a blown wire somewhere leading from the the battery.

There is a 10 gauge fusible lnk (just a 10 gauge wire) in the lead coming from the alternator that could have blown but that you don't have power anywhere would start my troubleshooting at the power leading into and out of the PDC.
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Old 01-05-2014, 07:21 PM   #4
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Originally Posted by Jerry Bransford View Post
Check for 12 volts at the lug under the little snap-off protective cover located at the very rear of the power distribution center, at the end closest to the battery. That lug is where power from the battery enters the PDC. If power is on that lug, there is likely a blown fuse inside the PDC. If no power is at that lug, you probably have a blown wire somewhere leading from the the battery.

There is a 10 gauge fusible lnk (just a 10 gauge wire) in the lead coming from the alternator that could have blown but that you don't have power anywhere would start my troubleshooting at the power leading into and out of the PDC.
LOL Jerry is there anything you don't know...I always look for your thoughts/opinions on threads here and have learned a ton from you.
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Old 01-05-2014, 08:11 PM   #5
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Thank you I will start there.

I had the cables already attached to the lawn mower and the ground attached it was when I was connecting the positive cable and I touch the side of the jeep right by the battery. My battery had slid over and was too close to the bod. got to fix that also.
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Old 01-05-2014, 08:33 PM   #6
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So you are saying you never touched any cable to anything on the jeep except ground/ body

Never touched any positive battery terminal or alternator terminal or any other jeep wires?

If that is true need to also know where on the jeep you connected the ground cable. The one from the tractor ground

If you never touched anything positive on jeep battery or alt or other red wire you most Lilly shorted the tractors battery across a jeep ground wire and probably damaged a ground. As you say the short was to jeep body probably a battery to body ground on jeep

To test this theory use your jumper cable to run from battery negative to a good body ground like a clean Not painter firewall bolt and see if that let's your jeep run

If it does we know you need to repair the body ground
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Old 01-05-2014, 08:42 PM   #7
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Clean not painted metal on body to jeep battery negative
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Old 01-06-2014, 06:33 AM   #8
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Everything was connected except the positive on the jeeps battery. That's when I touched the jeep body at the same time I connected the cable to the positive post and it sparked.
Thanks again for all the help
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Old 01-06-2014, 07:22 AM   #9
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I'd get an inexpensive test light. Clip the ground clamp on your alternator bracket and touch your battery +. If it lights work your way back the + cable thru each junction till you find the break. You might want to first touch both sides of each fuse in your Power Distribution Panel. If you get light on one side but not the other of any particular fuse, that fuse is blown. Takes maybe 5 minutes.

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