Question about 1988 Ford F 250

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Gauge showing low output alt only 1yr old wondering if it could be regulator or batt or wiring

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If you have access to a digital multimeter, connect the meter (set to volts) across positive and neg. terminal of the battery, should read roughly 12.6 volts, close to 10 volts, battery may be going out, also test the alt output, disconnect neg term and place negative lead to battery neg post and positive lead to neg battery cable (make sure meter is set to amps) should read near the rating, if both those, then you'd want to do a resistance test, (set meter to Ohms) disconnect battery and connect meter neg to either pos cable terminal or where the pos cable connects to the alt and connect positive lead to opposite of neg, should read next to 0, the check resistance of the ground by connecting meter between batt neg cable and body of alt.

- Spenser

Posted on Apr 04, 2011

  • jfljr50 Apr 04, 2011

    Thank you for your help

  • Spenser_jon Apr 04, 2011

    i'm glad i could

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