HEATING AND VENTILATION (Description): DESCRIPTION AND OPERATION (page 8 of 10)

HEATING AND VENTILATION

80-10

DESCRIPTION AND OPERATION

FBH unit

1 Air inlet hose
2 Electrical connectors
3 Exhaust pipe
4 Quick disconnect coupling

5 Coolant inlet hose
6 Fuel supply line
7 Circulation pump
8 Coolant outlet hose

The FBH unit is installed on the bulkhead in the engine compartment, on the side opposite the brake servo, and is 
connected in series in the coolant supply to the heater assembly. Two electrical connectors on the top of the FBH unit 
connect to the vehicle wiring.

FBH unit connector pin details

Connector/Pin 

No.

Description

Input/Output

C0925

2

K line (diagnostics)

Input/Output

3

Alternator power supply

Input

6

FBH fuel pump

Output

C0926

1

Battery power supply

Input

2

Earth

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