323001973 - 5550DB REVERSE GEAR ENGAGED SIGNAL CHECK
Turn the key to the ON position.Engage reverse gear and check that there is a 12 V supply at pin 4 of the interior rear view mirror connector.
| Pin | Function |
|---|---|
| 1 | Rain sensor positive |
| 2 | Rain sensor negative |
| 3 | A-bus line to rain sensor |
| 4 | Reversing switch |
| 5 | Earth |
| 6 | + 12 V key |