Symptom Table - Hummer H1 Service Manual

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SYMPTOM
Display inoperative, no sound from any
speaker.
No sound from one speaker (Delco
std.).
No sound from one speaker (Monsoon).
No sound from any speaker, radio dis-
play operates normally (Monsoon).
Compact disc player does not operate
properly.
Cassette player does not operate prop-
erly.
Antenna system test.
Rear seat audio does not operate.
Radio controls are inoperative.
Radio does not turn off.
Radio memory (clock and station pre-
sets) is inoperative.
Display dimming does not vary using
the I/P dimmer switch (I/P dimming
works).
Speaker output distorted at high volume
(Monsoon).
05745159

SYMPTOM TABLE

PROCEDURE
Chart #1
Chart #2
Chart #3
Chart #4
Chart #5
Chart #6
Chart #7
Chart #8
Service radio.
Service radio.
Check the gray wire (CKT 476) for an
open or high resistance between C56
terminal 7 and fuse 2H of the interior
fuse box.
Check the purple wire (CKT 17) for an
open or high resistance between C56
terminal "6" and the panel light dimmer.
Check for open or poor connection in the
black wire (CKT 59) from C62 terminals
"E8" and "E9" to the ground G4. Check
for open or poor connection in the light
green wire (CTK 829) from C62 terminals
"E11" and "E12" to fuse 1D.
If OK, replace amplifier.
Electrical System
PAGE NUMBER
12-152
12-152
12-153
12-154
12-155
12-156
12-157
12-160
12-151
3-1-01