INSPECTION PROCEDURE 10: Sound mixed with Noise, Only at Night (AM).: Diagnosis

STEP 1. Check the vehicles lighting system.
Q: Does the noise disappear when the vehicles headlights are turned "OFF"?
1. YES : Go to Step 2.
2. NO : Go to Step 3.
STEP 2. Check that the following actions disappear the noise.
Tune to a station with a stronger signal.

Q: Is there more noise than on radio in other vehicles?
1. YES : Consult the radio manufacturer's service center.
2. NO : Check that there is no noise.
STEP 3. Check that the noise fades away when the vehicle harness is moved away from the radio (if the harness is not in the proper position).
Q: Does the noise fade away when the vehicle harness is moved any from the radio (If the harness is not in the proper position)?
1. YES : Consult the radio manufacturer's service center.
2. NO : If there is more noise than other radios, consult the radio manufacturer's service center.