EM41 Fiat Interface Unit
Overview
The EM41 is used in Auto-Trail motorhomes having a large fridge/freezer for 2022 models onwards. Like the EM45, it is the same size as the EM40 and it has the same functionality, but has different connectivity.
Fuse Allocation
FUSE RATING USAGE
Fuse 1 20A Fridge Permanent
Fuse 2 20A Towing Permanent
Fuse 3 20A Vehicle Battery
Fuse 4 20A Fridge D+
Fuse 5 20A Towing D+
Fuse 6 5A Markers
Use only good quality fuses and DO NOT replace any fuse with one of a higher value than stated in the list above.
Connectivity
| CONNECTOR / PIN | FUNCTION | COLOUR / CABLE COLOUR | ||
| VB OUT | Vehicle battery out | BLACK MOULDING | ||
| 1 | Battery + | Brown/Green | ||
| 2 | Battery Ground | White/Orange | ||
| VB IN | Vehicle battery in | BLACK MOULDING | ||
| 1 | Battery + | Red | ||
| 2 | Battery Ground | Black | ||
| FRIDGE | Fridge power supply | BLACK MOULDING | ||
| 1 | Fridge Ground | White/Black | ||
| 2 | Fridge Permanent | Not Currently Used | ||
| 3 | Fridge D+ | Red/Yellow | ||
| TOW/VLM5/VLM7 | Tow & rear lights supplies | WHITE MOULDING | ||
| 1 | Low D+ | Orange/Yellow | ||
| 2 | Tow + | Yellow | ||
| 3 | Tow D+ | Red | ||
| FIAT IN | Signal inputs | RED MOULDING | ||
| 1 | not used | |||
| 2 | Marker light signal | Purple | ||
| 3 | Unlock | White | ||
| 4 | Lock | Green | ||
| 5 | Ignition (+12V) | Blue | ||
| 6 | Engine run (-ve) | Brown/White | ||
| TO PSU | user circuits | WHITE MOULDING | ||
| 1 | Low D+ | Orange/Yellow | ||
| 2 | Marker Light Power | Yellow/Black | ||
| 3 | Unlock | White | ||
| 4 | Lock | Green | ||
| 5 | Ignition (+12V) | Blue | ||
| 6 | Engine Run (-ve) | Brown/White |