Upper BEM Connector
Pin No Wire Colour Purpose Voltage
1 Â Not Connected (all) Â
3 Grey / Black Washer Pump (‘S’ & XR only) 12V Off, 0V On
4 Red / Yellow Door Unlock Line (XHI ‘S’ & XR, all XHII only) Ground to Unlock Doors
6 Yellow / Black Door Lock Line (XHI ‘S’ & XR, all XHII only) Ground to Lock Doors
12 Â Not Connected (all) Â
16 Â Not Connected (all) Â
18 Violet Rear Window Demister(‘S’ & XR only) 0V Demister On (Low)

Fig 2. Low / Mid Series Connector

Lower BEM Connector
Pin No Wire Colour Purpose Voltage
A1 Â Not Connected (all) Â
A2 Grey / Blue Heated Backlight Switch (Rear Window Demister) (‘S’ & XR only) +5V Off - 0V Depressed
A3 Green / White Front Intermittent wiper switch +12V Off - 0V On
A4 Blue Horn Relay +12V Off - 0V On
A5 Dark Green / Violet Ignition Switch Data I/ 0-5V PWM Data
A6 Red Ignition Power +12V Normal - 0V Immobilised
A7 Dark Blue / Lt Green Smartlock LED +12V LED Off - 5V LED On
A8 Red / Blue Starter Input +8V to 10V Cranking
A9 Â Not used Â
A10 Brown / White Variable Intermittent Wiper Control (Var Resistor) (‘S’ & XR only) 2.5V Low - 0.1V High
A11 Black / Blue Door open Switches 5V Off - 0V when door opened
A12 Violet / Yellow Accessories Power +12V Acc on, 0V Off
A13 Black Ignition Switch Ground Ground (0V) Supply to Ignition Lock Assy
A14 Blue / Orange Ignition Switch Internal Clock 0V to 5V PWM
A15 Â Not Used Â
A16 Green / Violet EEC V Enable 0V to 12V PWM Serial Data
A17 Grey / Black Front Window Washer Switch (Input) 12V Off - 0V On
A18 Light Blue Smartlock Diagnostic output 5V
A19 Red / Blue Starter Output +8V to 10V Cranking
A20 Brown / Green Ignition Switch Smartlock Power Supply +5V

Adding Extras

central locking: XH series I vehicles (except ‘S’ and XR models) do not have central locking fitted. E series actuators can be fitted to the doors and wired in – 4 wires per door are required, unlock (red/yellow – upper connector pin 4), lock (yellow/black – upper connector pin 6), earth, battery power (door lock fuse in fusebox – add fuse and connector).

A smartlock keyfob can be used for keyless operation – locate the top right hand pin in the diagnosis connector - use the next pin one position to the left of it. In the keyfob learning procedure, instead of pressing the demist button (which is absent), earth the selected diagnosis connector pin. If the pin is absent, you can install one, and connect it to pin A2 of the lower BEM connector.

Aftermarket actuators could also be fitted.

A central locking switch can also be added, as per the E series vehicles, by connecting lower BEM connector pin A1, and upper BEM connector pin 8 to the locking switch – see Fig 3.


Fig 3. Central Locking Install Switch