| All values measured to ground unless otherwise noted | |||
| A59/1 | |||
| 1.3 | Main ground to W6 | Approx. 0 Ohms to ground | |
| 1.4 | Circuit 30 main power input | 12 VDC at all times | Feed from F1f7 |
| 1.5 | Circuit 15R power input | 12 VDC with key in position "1" | Feed from F1f6 |
| 1.13 | Wake up signal input | No reliable test | |
| 1.14 1.15 |
Hands free microphone signal input low side and shield high side |
No reliable test, check with test microphone | |
| 1.20 | Shield connection | Note 1 | |
| D2B IN D2B OUT |
Optical input port Optical output port |
No reliable test | |
| Note 1 | Shield connection prevents from interference which might cause signal distortion | ||
| Note 2 | Pins 1,2,6,8,11,12,18,21,23,24 only carry system interchanging signals. | No reliable test, check continuity of wiring connection | |