Antenna: Testing and Inspection

1. Cheek the following electrical connections:
- Antenna lead connection at the radio

Windshield Antenna:

- Windshield antenna lead connector in the front dash panel

Antenna Amplifier Module:

- Three antenna amplifier connectors
2. Using an ohmmeter check for continuity at the antenna amplifier:
- Amplifier antenna lead connector to the radio antenna lead connector
- Amplifier white antenna lead connector to the connector in the front dash panel
- Amplifier bracket to a ground on the frame
3. Using an voltmeter, turn ignition switch to ON position, check for battery voltage at the amplifier bullet connector.
4. Move the vehicle outside and at least 10 meters (35 feet) from the nearest building. Turn ignition switch to the accessory position, turn radio ON, with a very weak AM station ON. Very weak is defined as a station the radio will not seek to. You should hear background noise, but still be able to understand the program material.
a. Disconnect antenna lead connector in the front dash panel. There should be a great drop in reception quality. If OK the antenna and amplifier are OK. If not OK, verify by connecting a 1.5 meters (5 ft.) piece of wire to the terminal and holding it vertical. Check for drop in radio reception quality. If OK replace windshield. If not OK, go to Step b.
b. Connect antenna lead connector in the front dash panel. Disconnect bullet connector at amplifier. There should be a great drop in reception quality. If not OK, replace antenna amplifier.

INTERFERENCE ELIMINATION
The engine ground cable is attach to the engine and to the right side of frame. This ground cable should be securely tightened to assure good metal to metal contact.

Interference may occur when the engine is running, on AM stations with a weak signal and this is not an indication of a faulty radio.

Resistive type spark plug cables in the high tension circuit of the ignition system complete the interference suppression. Faulty or deteriorated spark plug wires should be replaced if signs of insulation breakdown (visible arching) are present.

- If interference occurs when playing CD and/or radio, the short DIN cable maybe defective and need replacing.
- If interference occurs when playing audio and using the heated back glass with aftermarket metallic tinting on windows, remove tinting, replace glass, or use non-metallic tinting.