Question about 1991 Dodge B Series Cargo

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I have a 1991 dodge ram b250 replaced battery alternator check fuses checked wires an still no juice from alt can my ecm be bad

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The ecm tells the alt when to charge if it isn't your ecm can cost 1500 to ? to replace it. You can install a kit from your alt rebuilder to put an early regulator on it.
But your check engine light will come on,
you won't have 1500+ in a ecm

Posted on Dec 16, 2010

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If your not getting juice from your alternator then it is bad the ecm doesnt supply the alt with juice the alt produces its own so if its not producing the correct voltage it will need replaced. it should make 14.75 volts in order to keep your battery fully charged ang to keep up with all running accesories. it should put out no less than 13 volts

Posted on Aug 07, 2010

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