Antenna: Testing and Inspection

INSPECTION

GLASS ANTENNA TEST




1. Wrap aluminum toil around the tip of the tester probe as shown.




2. Touch one tester probe to the glass antenna terminal near, 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 with tine steel wool, then clean it with alcohol.




2. Carefully mask above and below the broken portion of the glass antenna wire with cellophane tape.




3. Using a small brush, apply a heavy coat of silver conductive paint 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.

GLASS ANTENNA AMPLIFIER TEST







1. Remove the quarter trim and the rear pillar trim.




2. Disconnect the 1 P connector (A) and 2 P connector (B) from the glass antenna amplifier (C).
3. Check if power supplied to ACC terminal of 1 P connector (A).
4. Check if ground position (D) of glass antenna amplifier grounded normally.
5. Verify that the glass antenna grid is properly wires. The antenna grid wires can be identified by it's color (white for AM and black for FM).

GLASS ANTENNA CIRCUIT INSPECTION




1. Turn the radio on.
Disconnect the 1 P power connector (A) from the amplifier.
Using the multi-meter, check the power (12 V) between the amplifier ground bolt (B) and power cable connector (A).
2. Using the multi-meter, check the power (0 V) between amplifier ground bolt and body panel.




3. Disconnect the glass antenna wire connector from the amplifier.
Check the continuity between the glass antenna grid node (AM/FM) and antenna wire connector terminal (AM/FM) using the multi-meter.




4. Check the glass antenna grid wire connector (A) for secure connection to the amplifier (B).

NOTE: The antenna grid wires can be identified by it's color. The white color for AM signal wire and the black color for FM signal wire.




5. Check for proper connection of radio cable (A) to amplifier.




6. Check the grid lines (A) for open or short.
7. When a poor radio reception is not repaired through the above inspection methods, replace the amplifier.
8. If the radio reception is still poor, check the radio cable for short and radio head unit for failure.