Test K

PINPOINT TEST K: POOR QUALITY/DISTORTED SOUND OR NO SOUND FROM ALL SPEAKERS - VNR

Test K1-K2:

Test K3-K4:

Test K5-K7:

Test K7:

Normal Operation
The audio unit directs the audio signals to the 8 channel amplifier and then to the speakers through separate positive and negative circuits for each of the five audio channels: LF, RF, LR, RR, and the subwoofer. The audio unit provides internal circuit protection for shorts to ground, shorts to B+ battery or shorts between any output circuits as well as providing a power on signal to the amplifier. Circuit 173 (DG/VT) sends an enable signal to the 8 channel amplifier.

Possible Cause
- Central junction box (CJB) fuse 1 (30A)
- audio unit
- amplifier
- circuit 1001 (WH/YE) open or short to ground
- circuit 173 (DG/VT) open or short to ground
- circuit 1205 (BK) open
- circuit 689 (DB) open or short to power
- speaker circuitry open or short to ground