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Page Title:
ELECTRIC HORN DOES NOT SOUND (Cont) |
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 TM 9-2320-285-24-1
2-22.
HORN SYSTEM TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
ELECTRIC HORN DOES NOT SOUND (Cont)
Step 4.
(terminal H).
a.
If voltmeter indicates less than 11 Vdc, replace horn relay (para 2-33a).
b.
If voltmeter indicates at least 11 Vdc, go to step 5 below.
Step 5.
Connect jumper lead from horn body to ground.
Press horn button; horn should sound.
a.
If horn sounds, clean corrosion from horn bracket (para 2-33a).
b.
If horn does not sound, go to step 6 below.
Step 6.
Have assistant depress horn button.
Use a voltmeter to check for 12 Vdc at horn terminal (blue electrical lead).
a.
If voltmeter indicates 12 Vdc, replace horn (para 2-33a).
b.
If voltmeter indicates zero, repair electrical lead (para 2-33a).
2-23.
BATTERY SYSTEM TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
BATTERIES REQUIRE FREQUENT FILLING
Step 1.
Run engine at 1200 rpm and watch voltmeter.
a.
If voltmeter pointer is within green arc, go to step 2 below.
b.
If voltmeter pointer is above green arc, shut down engine and refer to para 2-17, Malfunction 1.
Step 2.
Inspect battery cases for damage.
a.
If battery cases are damaged, replace batteries (para 2-34a).
b.
If cases are not damaged, refer to para 2-17, Malfunction 1.
2-191
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