Page 658 of 947

Battery System (14.01)
Power Supply (14.00)
May 2007 Workshop Manual 14-1-3
Charging Circuit
Electrical power generated at the alternator flows via two ‘T Pi ece’ connectors to the engine bay ‘Dirty Feed’ stud. It then
flows via the Battery Disconnect Switch (BDS) to the battery positive terminal. Both the alternator and the battery are
earthed via the vehicle body to complete the charging circuit.
The starter motor and the ‘jump start terminal’ ar e also fed directly from the charging circuit.
Go to page 18-X-XX for complete power dist ribution circuit diagram (Circuit Sheet 25).
+12 Volt Distribution
The +12 volt supply comes from the battery to the battery disc onnect switch (BDS). Assuming that this switch is not
activated, 12 volt power is then available from C0046-8 on the BDS to all of the clean feed battery studs.
The following clean feeds are then live:
• Boot fuse box clean feed
• Under bonnet fuse box clean feed
• CEM busbars 1, 2, 3 and 4 clean feeds
12V power to all systems and components is then controlled by the CEM and the under bonnet / boot fuse boxes.
Page 690 of 947

May 2007 Workshop Manual 18-1-1
Electric Distribution/Electronic Control (18.00)
Contents
Wiring and Circuit Protection (18.01) ................. 18-1-2Fuse Boxes .............................................................. 1-2 Engine Bay Fuse/Relay Box..................................... 1-2
Central Electronics Module Fusebox....................... 1-3
How to Read the Circuits........................................ 1-4 Wires ..................................................................... 1-4
Controller Area Network (CAN).............................. 1-5
Media Oriented System Transport (MOST) ............. 1-6
Connectors ............................................................. 1-6 Splices ................................................................... 1-7
Relays .................................................................... 1-8
Busbars .................................................................. 1-8
Fuses ..................................................................... 1-8
Resistors................................................................. 1-9
Lamps .................................................................... 1-9
Switches ................................................................ 1-9
Motors and Pumps ................................................. 1-9
Diodes ................................................................. 1-10
Transistor ............................................................. 1-10
Earth / Ground ..................................................... 1-10
Maintenance ......................................................... 1-11 Forward Harness-Renew ...................................... 1-11
Header Latch Harness-Renew
(Roadster Only) .................................................... 1-12
Roof Cylinder Wiring Harness-Renew
(Roadster Only) .................................................... 1-14
Transaxle Harness-Renew .................................... 1-21
Engine Wiring Harness-Renew ............................. 1-22
Facia Harness-Renew ........................................... 1-25
Cabin Harness Assembly-Renew .......................... 1-26
Passenger Door Harness-Renew ........................... 1-36
Driver’s Door Harness-Renew .............................. 1-36
Rear Bumper Harness-Renew .............................. 1-37
Transaxle Harness-Renew .................................... 1-37
Axle Transmission Harness-Renew
-Sportshift Only.................................................... 1-38
Tailgate Harness-Renew ....................................... 1-38
Vehicle Control System (18.08) ........................... 18-2-1 Module Configuration ............................................ 2-1 Principles of Operation .......................................... 2-1
Market Configuration ............................................. 2-1
Customer Configuration ......................................... 2-1
Data Buses .............................................................. 2-1
Network Bus ........................................................... 2-1 MOST.................................................................... 2-1
Module Locations ................................................... 2-2
Page 691 of 947
Wiring and Circuit Protection (18.01)
Electric Distribution/E lectronic Control (18.00)
18-1-2 Workshop Manual May 2007
Electric Distribution/Electronic Control (18.00)
Wiring and Circuit Protection (18.01)
Fuse Boxes
From the clean 12V output terminal of the battery
disconnect switch, electrical power is distributed to three
fuse boxes:
• Engine bay fuse box (LH side of engine bay on LH drive vehicles)
• Boot fuse box