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Electical problems

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bang

05-02-2001 11:17:52




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Last fall, the '49 8N wouldn't crank. Thinking it was a dead battery, my helper put the charger on - 6 volts, but negative to positive, positive to negative (he's 18 and never heard of "positive ground"). With no further time to investigate, we let her sit all winter. I pulled the battery, which recharged nicely, put it back in, and got clicking from the starter relay, so put on a new relay - same sound. Put on new starter - same sound. Tried putting on the charger, and it fried the insides, as though there were a short somewhere! I'm reluctatnt to put in a new battery and fry that too. The guys at the Ford dealership just shrugged, but vowed to get to the bottom of it (for lots of dollars). Since I'm a cheap son-of-a-gun, I'm wondering what to do next time (or this time, if they can't figure it out).

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Claus

05-02-2001 13:17:26




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 Re: electical problems in reply to bang, 05-02-2001 11:17:52  
Like the Army says, "The private cannot do wrong".
Do not entrust such activity to those who do not know. It does not matter what the polarity of the vehicle is as long as the charger goes positive to positive and negative to negative. The starter does not care about polarity either. You probably tried to to reverse charge the battery and ruined it. If you are a cheap-son-of-a-gun, you should not have taken it to the dealer and just purchased a new battery. The only thing the Dealer will get to the bottom of, is your wallet...
Happy Motoring
Claus

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TimK

05-02-2001 12:05:47




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 Re: electical problems in reply to bang, 05-02-2001 11:17:52  
Fried the insides of what? The charger or the battery ? If the battery was on positive ground when it was charged by the helper, negative to postive and positvie to negative on the battery charger was exactly right ! Even if you accidently hook up the charger wrong, it will just kick out the charger for a short time without damage to the charger or battery. Also, if a battery charges very quickly after being run down, that generally means that the battery is shot and not taking a proper, long period charge like it should. If the battery is charged ok, and if the starter is new, take some jumper cables and by-pass the tractor starter switch, the cables etc. and hook up directly to the positive pole on the starter and see if it turns over then. If it does, then you've got a bad connection or short somewhere between the starter and the battery. You can also try to jump it by using a 12v battery and by-passing the tractor starter switch etc. Just be careful when you jump it with eithe the 6v or 12v, make sure the tractor is in neutral and the clutch blocked down. If a good battery, whether 6v or 12v doesn't turn it over by jumping it, then it's got to be something in the starter, assuming the engine isn't seized up. My $.02

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bang

05-02-2001 13:16:04




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 Re: Re: electical problems in reply to TimK, 05-02-2001 12:05:47  
TimK - Thanks for the quick reply! The little mess fried my charger, which was almost brand new (used once before). So, are you saying that I should hook up the charger essentially backwards when the battery is in the tractor on positive ground? I haven't done it that way in the past. It does sound as though the battery is probably shot, but since my attempt to start the thing cooked my charger, I was affraid to put in a new battery until I got some expert advice.

Thanks again, Bang

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Timk

05-02-2001 13:57:31




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 Re: Re: Re: electical problems in reply to bang, 05-02-2001 13:16:04  
You got it. I hear what Claus said, but my charger will not charge if it's crossed on my positive ground set up. If the battery + is hooked up to the ground on the tractor, you have a positive ground set up. You should hook up your charger + to the battery + ( which is hooked to the ground cable) and the - side of the charger goes to the negative side of the battery, (which is the cable that goes to the starter junction switch). I'm surprised that you cooked the charger by hooking it up wrong. I had my son put the charger on my tractor w/ positive ground, and of course in error he hooked up the + on the charger to the positive pole on the battery like you did, but all we did was create a short spark and the charger relay simply kicked out. No harm. And that was with a 15 year old battery charger ! Before you go out and buy a new battery, pull your car up and jump it with the 12v from it. Your goal should be to see if you can get the engine to turn over and then go from there. My $.02

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8NRay

05-02-2001 13:44:18




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 Re: Re: Re: electical problems in reply to bang, 05-02-2001 13:16:04  
Me thinks your battery is shot. Get a new one and a new charger while your at it. Don't know how you could have fried the charger, unless it was a real cheap one and has no reverse current cut out relay. Make sure next one you get does. When using a charger, hook red lead (positive) to positive (+) side of battery and the black lead to the other. This is always true whether your charging the battery on an old tractor with positive ground or a new fangled car with negative ground.

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ED

05-02-2001 13:41:56




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 Re: Re: Re: electical problems in reply to bang, 05-02-2001 13:16:04  
Hey Bang - I always charge my 6 volt pos ground 2N with charger pos. terminal to battery pos. terminal.

Lately, due to cutout relay problems, I have been charging it quite a bit this way. Both battery and starter doing fine.



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