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Old 01-29-2012, 07:42 PM   #1 (permalink)
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1985 250ES Big Red Exciter coil

I have a 1985 250ES Big Red that after it has been running for about 10-15 minutes just quits. I believe that the problem is the exciter coil since the resistance between the blk/red wire to ground goes from 360 ohms when it is cold to over 500 ohms when it quits. After about 5 minutes after it cools down the resistance for the exciter coil goes back down to 360 ohms then it starts. According to the service manual the blk/red wire to ground should read 50-200 ohms. My question is where is the exciter coil located?? Is it part of the alternator??
Any help would be appreciated. Thank you in advance.
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Old 01-29-2012, 07:54 PM   #2 (permalink)
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Welcome to the forums. Yes, it's one of the coils on the stator/alternator assembly.
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