For 1990-2009 cars only
To determine if frontway noise is present, preform the following steps:
- Place the ignition switch in the ACCY position.
- Seek up the band range from (88 FM) and (550 AM) to the top of each band.
- Count the number of valid stations the tuner stops at on each band.
- Listen for various noise problems.
- Perform steps two through four with the ignition switch in the ON position and the engine OFF.
- Perform steps two through four with the ignition switch in the ON position and the engine running.
These steps (5 and 6) can help determine which components are causing the interference problem. For example, if the same number of stations are received with the engine running as when the engine was off, the components active with the engine running are NOT causing the interference.
| • | Select the ignition switch position which caused the noise problem. |
| • | Select a radio station with the noise present. |
| • | Unplug the antenna from the back of the radio. |
If frontway noise is present, the noise will be eliminated.
Frontway noise can be caused by poor antenna grounding, refer to Radio Poor Reception or poor radio case ground.
Other causes include defective:
| • | Relays |
| • | Solenoids |
| • | Switches |
To correct the problem, diagnose and repair antenna ground, install braided ground strap between radio case and H-bracket, or identify and replace the defective relay, switch, or solenoid.
