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Repair guides and support for the first generation Grand Cherokee ZJ, an upscale mid-size SUV built by Chrysler's Jeep division.

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Battery voltage too high

OBD on 95 jeep is giving code 46- battery voltage too high. What is the cause & what is the fix?? TYIA

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Hi @purplequeen ,

With the engine running, use a Voltmeter to check the voltage across the vehicle’s battery terminals.

You should measure a voltage reading in the range of 13.8 -14.5V DC.

(If you haven’t got a DMM (digital multimeter) or know someone who has, see an auto electrician and get them to check it for you.)

If it is higher (or lower) than this there is a problem with the vehicle’s voltage regulator.

I don’t know your vehicle so I’m not sure if the voltage regulator is mounted in the alternator or is external to the alternator.

Be safety aware when you do this as the engine is running. Ensure the vehicle’s emergency brake (handbrake) is applied and that the transmission is in park (or neutral)

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