Antenna - Power Chevrolet Camaro III рестайлинг

DESCRIPTION

The antenna automatically raises to full height whenever radio and ignition are turned on. Antenna retracts to fender when either radio or ignition is turned off.

Drive unit is encased in a 2-piece plastic housing attached to mast and tube assembly. A permanent magnet motor with worm drive moves the antenna up and down. A plastic cable is attached to upper mast section. Upper and lower travel limits are controlled by switches opened by armature shaft thrust as mast reaches end of its travel. A circuit breaker is used to prevent motor from overheating.

Exploded View of GM Power Antenna. Scheme 1

ANTENNA DOESN'T RAISE OR LOWER

Check for blown fuse, loose electrical connections on receiver or antenna, bent antenna mast or a malfunctioning relay. See TESTING .

WEAK RECEPTION OR FADING

Moisture in support tube from condensation or leakage. Antenna must be removed and disassembled and drive housing cleaned or replaced.

EXCESS IGNITION NOISE, ERRATIC AUDIO OR REDUCED CB RECEPTION

Poor grounding of antenna at mounting or at lead-in system. Antenna ground must be checked as described in TESTING.

PRELIMINARY CHECK

1. Unplug antenna lead at back of radio and plug in a known good antenna. Ground test antenna and keep hands off mast. Check reception in an area away from electrical interference.
2. Tune radio to high and low ends of dial in both AM and FM bands. If reception is okay, a problem exists with antenna and/or lead-in cable. If reception is still poor, check radio for problems.

LEAD-IN CABLE CHECK

Usually symptoms of broken center conductor of lead-in cable will result in no AM and weak FM reception. In cases of continued reception problems, always check lead-in with an ohmmeter. See LEAD-IN CABLE RESISTANCE table. When checking resistance, carefully wiggle the lead-in tip and cable. If results are not as listed in chart, the lead-in should be replaced.

Lead-In Resistance Check Points. Scheme 2

LEAD-IN CABLE RESISTANCE

GROUND CHECK

1. Fully lower antenna. Remove escutcheon from fender. Attach alligator clip to upper end of mast to act as antenna. Leave other end of clip unattached.
2. Tune radio to a weak AM station, or a station which is received through alligator clip. Remove the clip. Ground the upper end of the mast to the fender.
3. If the same station is not received, the grounds are good, and no further action is necessary. If the station is still present, or even stronger, a poor ground or no ground condition exists.
4. Possible ground loss points are: antenna upper mounting (screw loose, paint overspray), coaxial connector at mast not connected or corroded, coaxial connector at radio not tight or corroded or quick connector corroded.

ANTENNA DOES NOT FULLY RAISE OR LOWER

1. If motor operates, pull up on top section of mast. If mast moves freely, plastic drive cable is broken. Replace mast and support tube. If cable is not broken, remove mast and support tube. Check mast sections for binding.
2. If binding exists, eliminate binding or replace mast and support tube. If no binds exist, check drive cable for broken hook. If no breaks exist, replace gear and spool assembly.

ANTENNA DOES NOT LOWER

1. If the motor does not run, check CLK-CIG fuse in fuse block. If fuse is blown, remove relay and install new fuse. If fuse blows again, repair short in Orange wire. If fuse does not blow, check for short in White wire. If there is no short, replace relay. If White wire is shorted, repair wire. If there is no short, repair motor.
2. If the fuse was good in original check, use test light and check for 12 volts at Orange wire at antenna relay. If light does not glow, repair open in Orange wire. If light glows, check for voltage at White wire on relay.
3. If light does not glow, replace antenna relay. If light glows, check for open in White wire. If no open exists, check for voltage at Dark Green wire. If light glows, check relay connections and ground wire. If both are okay, replace relay. If light does not glow, check for loose connection between relay and connector or connector to antenna. If okay, repair motor.

ANTENNA DOES NOT RAISE

1. If motor does not run, check fuses in fuse block. If radio fuse is blown, repair radio. If CLK-CIG fuse is blown, remove antenna relay, install new fuse and recheck. If CLK-CIG fuse is okay, disconnect 3-wire connector with White wire and install connector with Orange wire at antenna relay.
2. Recheck fuse. If blown, replace relay. If okay, check for short in Gray and Dark Green wires from relay to antenna motor connector and to the antenna assembly. If no short, replace antenna motor. If new fuse installed blows, repair short in Orange wire from fuse panel to connector.
3. If fuses were okay in original check, turn ignition off. Connect test light to Orange wire at relay connector. If light does not glow, repair open in Orange wire. If light glows, turn ignition and radio on and listen for relay click.
4. If relay does not click, check for open relay ground, open in Pink wire, or bad radio switch. Probe Pink wire with test light. If voltage exists, replace relay. If relay clicked, check for voltage at Dark Green wire in relay connector. If light does not glow, replace relay.
5. If light glows, check for voltage at Gray wire. If light glows, check relay connections and ground wire. If okay, replace relay. If light does not glow at Gray wire, check for open or short in Gray and Dark Green wires. If okay, repair motor.

Note. The following procedure is a general procedure for all vehicles. Not all steps apply to all models.

Removal

1. Disconnect negative battery cable. Turn steering wheel to full right or left stop, depending on which fender antenna is mounted. Remove fender inner splash shield. Remove instrument panel sound absorber.
2. Disconnect antenna lead-in connector from radio, then from antenna relay. Remove antenna-to-fender attaching retainers. Remove tire and wheel if necessary to gain access under fender. Remove inner fender supports.
3. Remove antenna bracket bolts, or lower antenna attaching screws. On Cadillac RWD models, attach a 4-foot guide wire to top of antenna to help guide mast sections out of housing. On all other models, with all wiring disconnected, gently guide wires and antenna through fender opening.

Installation

To install, reverse removal procedures. On Cadillac RWD, use guide wire to guide new antenna into housing.

See also:
• TESTING