TROUBLESHOOTING THE M998 ELECT SYST. - OD1617 - LESSON 1/TASK 1
(2) Malfunction: BATTERIES NOT CHARGING PROPERLY (VOLTMETER IN RED
OR YELLOW).
While reading through this text, refer to figure 2 on
the previous page.
NOTE
If the vehicle is equipped with a 100
amp
the
voltage
regulator
must
be
replaced, instead of attempting to adjust
the
alternator output voltage.
Step 1.
Remove the companion seat/battery box cover, following the
procedures in paragraph 10-22 of the TM. Now start the engine. Once
the engine has been started, increase the engine speed above idle.
Using a multimeter, check the battery voltage by connecting the
multimeter leads to the positive power stud and the ground cable in
the battery box. If the battery voltage is greater than 28.2 volts,
adjust the alternator, following the procedures contained in
paragraph 4-2 of the TM.
If the battery voltage is less than 27.8
volts, check for loose or broken drivebelts. If the belts are loose
or broken, adjust or replace them, following the procedures found in
paragraphs 3-74 and 3-76 of the TM. Now repeat step 1 and check the
battery voltage. If the battery voltage is still too low, adjust the
alternator, following procedures contained in paragraph 4-2 of the
TM. If the battery voltage is between 27.8 and 28.2 volts, check the
operation of the voltmeter gage, referring to malfunction 15 on page
2-40 of the TM.
Step 2.
If the battery voltage is still too low, disconnect lead
568A from the alternator.
Now, using a multimeter, check lead 568A
in the engine harness for battery voltage with the rotary switch in
the RUN position.
If battery voltage is present, replace the 60
ampere alternator, following the procedures found in paragraph 4-2 of
the TM, or the 100 ampere alternator, following the procedures found
in paragraph 12-22 of the TM.
13
Previous Page
