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changed alternator and...


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I changed my alternator this morning. Went from a Bosch to a Napa Denso. The install went well, but when I started the truck, the scan gauge II did not pick up the water temp for the intake temp for about 5 minutes. I shut the truck off, restarted, and started registering water temp and intake temp after a few seconds. The alternator is putting out 14+ VDC. Rated at 136 Amps. There were no codes thrown, and yesterday was working fine after my radiator flush/water pump repl/and t-stat replacement. Anyone have any ideas of anything I should check should this recur? Thanks.

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Positive to Positive and Negative to Negative. Check DC voltage then Check AC voltage. DC Voltage: 13.5 to 14.5 DC Volts (Passing grade)AC Voltage: Less than 0.1 AC Volts (Passing grade)If you get a instant 31 Volts AC your DVM is low quality and is not capable of measure different frequencies other than 60 Hz household. Oscilloscope is the best way to measure alternator output but not everyone has one.

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Positive to Positive and Negative to Negative. Check DC voltage then Check AC voltage. DC Voltage: 13.5 to 14.5 DC Volts (Passing grade) AC Voltage: Less than 0.1 AC Volts (Passing grade) If you get a instant 31 Volts AC your DVM is low quality and is not capable of measure different frequencies other than 60 Hz household. Oscilloscope is the best way to measure alternator output but not everyone has one.

Positive of what to positive of what ?
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