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post #1 of 4 (permalink) Old 01-07-2013, 09:52 PM Thread Starter
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New member looking for a little help

Hey all I am not an avid forum user an may be doing this wrong but I am at a loss with a little barn find I have acquired... It's a 78' John deere spit fire 340 f/a. I have put some elbow grease and a lot of time into it. She is running like a dream but the lighting system is a mystery to me. I have tried putting new head lights in an it blows them promptly , with a meter on the plug I get only a/c voltage ?????? Is that normal ?? Any help would be greatly appreciated !
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post #2 of 4 (permalink) Old 01-08-2013, 11:37 AM
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Stator plates generate AC current, bulbs don't care. It's likely that the voltage regulator that goes to the lighting is bad, leading to blowing the bulb. What is the voltage at the headlight socket? Anything above about 14 volts would indicate a bad regulator...

2007 RMK 700, 2008 RMK 600, 1995 AC Prowler 2-up, 1980? AC Cheetah
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post #3 of 4 (permalink) Old 01-08-2013, 10:18 PM Thread Starter
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Well I got a range of 7.8 volts to 22 volts from idle to half throttle I am going to replace the regulator, thanks for your help !
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post #4 of 4 (permalink) Old 01-09-2013, 01:52 AM
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Hope that's it! Cheap fixes are way better than spendy ones

2007 RMK 700, 2008 RMK 600, 1995 AC Prowler 2-up, 1980? AC Cheetah
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