Antenna: Testing and Inspection
ANTENNAINSPECTION
GLASS ANTENNA TEST
1. Wrap aluminum foil (A) around the tip of the tester probe (B) as shown.
2. Touch one tester probe to the glass antenna terminal (A) hear, and move the other tester probe along the antenna wires to check that continuity exists.
GLASS ANTENNA REPAIR
NOTE: To make an effective repair, the broken section must be no longer than one inch.
1. Lightly rub the area around the broken section (A) with fine steel wool, and then clean it with alcohol.
2. Carefully mask above and below the broken portion of the glass antenna wire (B) with cellophane tape (C).
3. Using a small brush, apply a heavy coat of silver conductive paint (A) extending about 1/8 on both sides of the break. Allow 30 minutes to dry.
NOTE: Thoroughly mix the paint before use.
4. Check for continuity in the repaired wire.
5. Apply a second coat of paint in the same way. Let it dry three hours before removing the tape.
DIVERSITY & RADIO AMPLIFIER INSPECTION
1. Disconnect power connector 1P (A) from the diversity.
2. Turn the radio ON.
Measure the voltage between the harness side power connector and body ground.
OK : approximately 12 V (ACC+)
3. Remove the radio feeder cable from the diversity and radio amp.
4. Check for continuity between diversity and right side radio amp feeder cable (B).
5. Check for continuity between diversity and left side radio amp feeder cable (C).
6. Disconnect the 2P power connector from the glass antenna radio amp.
7. Check for continuity between terminals of harness side connector and antenna grid terminals (AM, FM).
8. Check the grid lines that continuity exists.
9. When a poor radio reception is not repaired through the above inspection methods, replace the amp. If the radio reception is still poor, check the radio cable for short and radio head unit for failure.
ANTENNA CABLE
1. Remove the antenna jack from the audio unit and antenna.
2. Check for continuity between the center poles of antenna cable.
3. Check for continuity between the outer poles of antenna cable. There should be continuity.
4. It there is no continuity, replace the antenna cable.
5. Check for continuity between the center pole of antenna cable and terminal of glass antenna. There should be continuity.
6. If there is no continuity, replace the antenna amplifier.
7. Check for continuity between the center pole (A) and outer pole (B) of antenna cable. There should be no continuity.
8. If there is continuity, replace the antenna cable.