Fault Code Guide

See Fig. 1 for an illustration of the Bulkhead Module
(BHM) Harness Connections.
See Fig. 2 for maximum allowable current load for
the full BHM output pins (part numbers A06-40959-
000 and A06-40959-002).
See Fig. 3 for an illustration of the BHM with pinout
assignments and harness connections.
09/26/2001
1
2
3
4
6
7
8
f543870
5
1. B1, Forward Chassis Harness
2. B2, Engine Harness
3. B3, Frontwall Harness
4. B4, Frontwall Harness
5. Frontwall
6. B5, Dash Harness
7. B6, Dash Harness
8. B7, Dash Harness
Fig. 1, Bulkhead Module Harness Connections
f544533
See Note A below.
B5.E − SPARE (Utility Light/Spotlight)
B4.M − SPARE (Utility Light/Spotlight)
B3.E − Horn
B5.F − Cigar Lighter Output
B5.H − Panel Lamps
B7.A1 − Panel Lamps (Smart Switch)
B5.G − SPARE (Ignition)
B6.A9 − Accessory (HVAC)
B6.A10 − Accessory (Radio)
B4.F − SPARE (Left Heated Mirror)
B4.E − SPARE (Right Heated Mirror)
B6.A8 − Ignition (VCU)
B2.K − Ignition (Engine)
B1.P − Ignition (ABS)
B5.A − Battery (Dome Lamps)
B7.A12 − Battery (Smart Switch)
B5.D − Wake Up (Instrument Cluster)
B5.B − Dome Lamps Switched
B1.L − Left High Beam
B2.L − Ignition (Trans)
B1.F − Fuel Water Sensor Power
B3.F − Wiper High
B5.C − Clearance Lamps
B1.K − Tail/License Plate/Trailer Relay
B1.R − Left Low Beam
B3.H − Wiper Low
B3.G − Washer Pump
B2.M − AC Clutch
B4.B − Starter Relay (Crank)
6.7A
6.7A
6.7A
6.7A
6.7A
6.7A
Combined
6.7A
6.7A
6.7A
6.7A
6.7A
Combined
6.7A
Combined
6.7A
Combined
12A
Combined
12A
12A
Combined
12A
20A
Bulkhead Module
12A
Combined
11/24/2004
NOTE A: Pulse Width Modulated Output
Fig. 2, Maximum Allowable Current Load for the Full-
Feature Bulkhead Module Output Pins (part numbers
A06-40959-000 and A06-40959-002)
Bulkhead Module 54.12
Specifications
Business Class M2 Workshop Manual, Supplement 10, September 2006 400/1