| Number | X-pin, color | Description |
|---|---|---|
| X18801 | 12-pin, blue | Connector On-board monitor |
| X18802 | 12-pin, blue | Connector On-board monitor |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Nighttime illumination signal | Nighttime illumination splice |
| 2 | M | Ground | Ground point |
| 3 | A | Left tape voltage control | Radio |
| 4 | A | Left tape ground control | Radio |
| 5 | Not used | ||
| 6 | E/A | I/K-bus signal link | Connector, I/K-bus |
| 7 | E | Terminal 30 | Fuse F75 |
| 8 | Not used | ||
| 9 | A | Right tape ground control | Radio |
| 10 | A | Right tape voltage control | Radio |
| 11 | Not used | ||
| 12 | E/A | LCD data link | On-board monitor |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Navigation video signal, red | Video module |
| 2 | M | Navigation video signal, red Ground | Video module |
| 3 | A | Navigation video signal, green | Video module |
| 4 | M | Navigation video signal, green Ground | Video module |
| 5 | A | Navigation video signal, blue | Video module |
| 6 | M | Navigation video signal, blue Ground | Video module |
| 7 | A | Video module ground signal | Video module |
| 8 | E | Terminal 30 | Fuse F75 |
| 9 | Not used | ||
| 10 | Not used | ||
| 11 | Not used | ||
| 12 | E/A | LCD data link | On-board monitor |