VW TRANSPORTER 2003 — Auxiliary coolant heater, (B4W/D4W),(9AH) . Wiring diagrams, Pin Connector, Location

Wiring Diagram VW TRANSPORTER 2003 - Second battery - Pre-selection clock - Heater control unit - Auxiliary heater fuse - Control panel fuse - Metering pump

A1	Second battery
E111	Pre-selection clock
J162	Heater control unit, on heater unit
L75	Digital display illumination bulb
S126	Auxiliary heater fuse, under driver seat
S129	Control panel fuse, under driver seat
T2d	2-pin connector, behind relay plate
T8e	8-pin connector, behind relay plate
T8i	8-pin connector, near heater unit
T8j	8-pin connector, behind relay plate
V54	Metering pump
110	Earth connection 2, in dash panel wiring harness
253	Earth connection, in heater unit wiring harness
A53	Positive connection (58b), in dash panel wiring harness
L59	Positive connection (30), in heater unit wiring harness

Wiring Diagram VW TRANSPORTER 2003 - Ambient temperature switch - Heater control unit - Combustion air blower

C	Alternator
F38	Ambient temperature switch
J162	Heater control unit, on heater unit
J255	Climatronic control unit
J285	Control unit in dash panel insert
T1g	Single connector, behind relay plate
T8e	8-pin connector, behind relay plate
T8i	8-pin connector, near heater unit
T14	14-pin connector
T28a	28-pin connector, red, on Climatronic control units
TV14	Self-diagnosis wiring junction, white
T32	32-pin connector, blue
V6	Combustion air blower

Wiring Diagram VW TRANSPORTER 2003 - Flame monitor - Overheating sensor - Coolant temperature sender for heater - Heater control unit - Glow plug for heater

G64	Flame monitor
G189	Overheating sensor
G241	Coolant temperature sender for heater
J162	Heater control unit, on heater unit
Q9	Glow plug for heater
T2b	2-pin connector
T14	14-pin connector

Wiring Diagram VW TRANSPORTER 2003 - Thermal switch for continued circulation of coolant - Auxiliary coolant heater relay - Coolant circuit valve - Radiator shut-off two-way valve - Fuse 17 in fuse holder - Fuse 19 in fuse holder - Circulation pump

F18	Radiator fan thermal switch
F95	Thermal switch for continued circulation of coolant
J493	Auxiliary coolant heater relay, under driver seat
N214	Coolant circuit valve
N273	Radiator shut-off two-way valve
S17	Fuse 17 in fuse holder
S19	Fuse 19 in fuse holder
T1p	Single connector, behind relay plate
T1q	Single connector, behind relay plate
T2e	2-pin connector, behind relay plate
T6a	6-pin connector, behind relay plate
T8e	8-pin connector, behind relay plate
T8j	8-pin connector, behind relay plate
T9	9-pin connector
V55	Circulation pump
18	Earth point, on cylinder block
C41	Positive connection (30a), in headlight wiring harness