Guardian 4389 Diagnostic Repair Manual page 105

SECTION 4.4
DIAGNOSTIC TESTS
Figure 14. Test Bracket
REMOVE STARTER MOTOR:
It is recommended that the starter motor be removed
from the engine when testing starter motor
performance. Assemble starter to test bracket and
clamp test bracket in vise, Figure 15.
TESTING STARTER MOTOR:
1. A fully charged 12 volt battery is required.
2. Connect jumper cables and clamp-on ammeter as
shown in Figure 15.
3. With the starter motor activated (jump the terminal on the
starter contactor to battery voltage), note the reading on
the clamp-on ammeter and on the tachometer (rpm).
N N o o t t e e : : T T a a k k e e t t h h e e r r e e a a d d i i n n g g a a f f t t e e r r t t h h e e a a m m m m e e t t e e r r a a n n d d
t t a a c c h h o o m m e e t t e e r r a a r r e e s s t t a a b b i i l l i i z z e e d d , , a a p p p p r r o o x x i i m m a a t t e e l l y y 2 2 -4 4
s s e e c c o o n n d d s s . .
Page 4.4-8
PART 4
DC CONTROL