Component Replacement; Radio And Tape Player - GMC 1976 ZEO 6083 Maintenance Manual

Figure 43-Horn Installation (Typical)
Refer to ENGINE AND CHASSIS WIRING
DIAGRAM for horn and door buzzer wiring circuit.
HORN DIAGNOSIS
For diagnosis of horn system refer to Figure 45 .
COMPONENT REPLACEMENT
HORN
1 . Disconnect battery ground cables, then open
left front engine access door and remove the dark
green wires and connectors from the horn assembly .
Radio options include an AM radio, AM-FM,
AM-Tape, AM-FM Stereo and AM-FM-Tape
Stereo unit. There are two 3-1/2 inch speakers (fig
ure 38) located in each of the front dome light panels
and two in each of the rear corners of the vehicle.
The antenna is roof mounted with coaxial cable run-
ning down the center windshield pillar to the radio.
44).
RADIO AND TAPE PLAYER
CHASSIS ELECTRICAL
12- 2 9
Figure 44-Horn Relay-Buzzer Installation
2. Remove the horn mounting bolts and remove
horns (See figure 43).
3. Reverse steps to install horns and check oper-
ation .
HORN RELAY-BUZZER
1 . Disconnect battery ground cables .
2. Remove horn relay buzzer connector (figure
3. Remove mounting bolt which attaches relay-
buzzer to panel.
4. Install buzzer by reversing steps 1-3, making
sure that headlamp ground wire is placed under relay
mounting tab.
On AM-FM receivers, a frequency band selector
bar is used to change from the AM to FM reception.
Moving the band selector bar to the left, engages the
FM band and all preset FM stations . Conversely,
moving the selector bar to the right engages the AM
band. Any preset AM or FM station can be mechani-
cally tuned by depressing the appropriate push but-
ton located directly below the band selector bar.