2-128TM 9-2350-267-20Connect red multimeter lead to the positive battery cable terminaland black lead to negative battery cable terminal.Start engine and run at approximately 1000 rpm. Run engine as re-quired to bring engine compartment, regulator and batteries to nor-mal operating temperature.With engine running at 1000 rpm, use a screwdriver to adjustDuring above warm-up period, increase engine speed to approximate-rheostat to obtain a voltage reading of 27.5 to 28.5 volts. Turnly 2500 rpm and then return to idle speed while observing multimeter.screwdriver counterclockwise to reduce voltage. Slowly turnVoltage reading should not vary more than + 0.1 volt during abovescrewdriver clockwise to bring regulated voltage up to 27.5 to 28.5check. This also provides a check on tightness of wiring connection.volts.Turn headlights on and off several times. Multimeter needle mayReplace plug in end of regulator (screw on top of regulator).vary slightly, but should return to its original (voltage) quickly.Turn off all major vehicle electrical components and turn on vehicleShut off engine and remove multimeter.headlights.If regulator cannot be adjusted, replace regulator (p 6-5).Open transmission left access door and remove square head pipe plugfrom end of voltage regulator (between and above harnessIf electrical (battery) problems continue after the regulator has beenconnectors).properly checked and/or adjusted, check the service, maintenanceand/or usage of the battery (TM 9-6140-200-141.TA310487
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