Question about 1990 Ford Bronco

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My alternator caught on fire through what i think is my voltage regulator it is a 1990 ford bronco inline 6 300 where should i start looking for the problem also the connector goin into the alt. is ashes now so should i replace that too

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Yes,alwaways replace fire damaged componants. Now, I really don't think the fire was caused by the regulator. When an alternater works at maximum output for an extended period, it overheats and overheats enough to melts soldered connections. Better known as slinging solder. When this happens loose connections go where they shouldn't and a short is created which in turn heats and melts the winding lamination which is what actuall catches fire.Once you replace the Alt. the impportant thing is to find out why yhe old one got so hot. Make sure the charging rate is between 13.6 and 14.2v. Anything less than 23 volts will cause an heating up. This is because the Alt is very, very near full output. Make sure all grounds are good and the battery fluid is at rec, level. Good Luck, Ned

Posted on Nov 12, 2009

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Hello, I had a Dodge D100 which did the same many years ago, hope this helps. I not only had alternator prob's but my battery exploded too! The alternator has/had a seperate regulator control box and a wire had chaffed which was touching the body causing the regulator box to think Battery totally flat so pushing max amps through the system till bang.
So? If the Ford has the same system or not try looking for reasons to cause a possible charging overload.
Good Luck and Merry Christmas!
Paul 'W'

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