2-128
TM 9-2350-267-20
Connect red multimeter lead to the positive battery cable terminal
and 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 adjust
During above warm-up period, increase engine speed to approximate-
rheostat to obtain a voltage reading of 27.5 to 28.5 volts. Turn
ly 2500 rpm and then return to idle speed while observing multimeter.
screwdriver counterclockwise to reduce voltage. Slowly turn
Voltage reading should not vary more than + 0.1 volt during above
screwdriver clockwise to bring regulated voltage up to 27.5 to 28.5
check. This also provides a check on tightness of wiring connection.
volts.
Turn headlights on and off several times. Multimeter needle may
Replace 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 vehicle
Shut 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 plug
from end of voltage regulator (between and above harness
If electrical (battery) problems continue after the regulator has been
connectors).
properly checked and/or adjusted, check the service, maintenance
and/or usage of the battery (TM 9-6140-200-141.
TA310487
