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Old 09-16-2003, 07:10 PM   #1
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Voltage Regulator

I have a 1981 Excella MH with a Isuzu diesel (non turbo). When I am at a normal speed on the road the voltage is in the 16 volt/red range on the voltage indicator. I'm assuming I should replace the voltage regulator. I also believe that the voltage regulator in this unit is an Isuzu part as per the manual. Any suggestions ?
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Old 09-16-2003, 07:15 PM   #2
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Before you go replacing the voltage regulator I would chek the battery isolator and the batteries. If you have a shorted cell it could cause the alternator to push more. The batteries will only allow the alternator to push in as much as they can take. A bad isolator can cause the same type of readings and boil the batteries.

If the batteries are fine, then you may have a bad regulator or alternator. The alternator is not the normal one you buy at Autozone, so be sure to get an exact replacement, or have this one rebuilt.
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Old 09-16-2003, 07:36 PM   #3
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If it is a Nippendenso I would do everything I could to replace it, even if it means making new brackets. Their alternators and starters are nothing but headaches.

John
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