TM 5-3805-262-20
5-2. ALTERNATOR MAINTENANCE
a. T e s t i n g .
This task covers on-vehicle testing of the alternator. Perform this
procedure anytime you suspect alternator problems.
(1) Alternator Voltage Test.
This test verifies wiring continuity and checks
alternator output voltage. Perform this test before doing alternator output current
t e s t s ( p a g e 5 - 8 ).
TOOLS: No. 1 Common Organizational Maintenance Tool Kit
Multimeter
NOTE
PRELIMINARY PROCEDURE: Engine left rear side panel removed (page 9-14).
TESTING (SHEET 1 OF 2)
(a) Connect multimeter negative lead to alternator housing and multimeter
positive lead to BAT terminal as shown.
(b) Record multimeter indication.
(c) If multimeter indication recorded in step (b) above is approximately 24
v o l t s ( b a t t e r y v o l t a g e )
, wiring for alternator output is okay. Go to
step (e) below.
(d) If multimeter indication is not approximately 24 volts (battery volt-
age), troubleshoot wiring harness and connections between alternator BAT
terminal and batteries (page 3-60) before doing the following alternator
t e s t s .
5-6
