312001217 - 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 3 of the interior rear view mirror connector.
| Mirror connector | |
|---|---|
| Pin | Function |
| 1 | +12V ignition from Body Computer |
| 2 | Earth |
| 3 | + 12V signal from reverse |