Test H: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - Navigation

PINPOINT TEST H: POOR QUALITY/DISTORTED/NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS) - NAVIGATION

H1:

H2-H4:

H4-H6:

H6-H8:

H8-H9:

Normal Operation
When the key is placed in START, voltage is sent to the audio unit through circuit 1000 (RD/BK). When the audio unit receives this signal, it mutes the speaker signals. After the key is removed from START, the audio unit directs audio signals to the audio amplifier, then to the speakers through separate positive and negative circuits. The audio unit provides internal circuit protection for shorts to ground, shorts to B+ battery, or shorts between any output circuits.

Possible Causes
- Circuit 173 (DG/VT) open or short to ground
- Circuit 277 (LB/BK) open, short to ground or voltage
- Circuit 278 (VT/WH) open, short to ground or voltage
- Circuit 279 (WH/RD) open, short to ground or voltage
- Circuit 280 (LG) open, short to ground or voltage
- Circuit 800 (GY/LB) open, short to ground or voltage
- Circuit 801 (TN/YE) open, short to ground or voltage
- Circuit 802 (OG/RD) open, short to ground or voltage
- Circuit 803 (BN/PK) open, short to ground or voltage
- Circuit 804 (OG/LG) open, short to ground or voltage
- Circuit 805 (WH/LG) open, short to ground or voltage
- Circuit 811 (DG/OG) open, short to ground or voltage
- Circuit 813 (LB/WH) open, short to ground or voltage
- Circuit 855 (LB) open, short to ground or voltage
- Circuit 857 (WH/OG) open, short to ground or voltage
- Circuit 858 (BN) open, short to ground or voltage
- Circuit 859 (YE) open, short to ground or voltage
- Speaker(s)
- Audio amplifier
- Audio unit