Cooling Fan wiring diagram - 1993 Volkswagen Passat

T4/1

Power out to Coolant Fan V7 - HI speed

T4/2

Power out to Coolant Fan V7 - MED speed

T4/3

Power in from J32 A/C Relay and fuse S19, and F18 Coolant Fan
Control Thermal Switch Terminal 2

T4/4

Power in from Battery positive

T8e/1

Power out to J206 Fuel Pump After Run Control Module

T8e/2

Input signal for MED speed Coolant Fan operation from F18 Coolant Fan Control Thermal Switch and/or F129 A/C Pressure Switch

T8e/3

Input signal for HI speed Coolant Fan operation from F165 Third Speed Coolant Fan Thermal Switch

T8e/4

Power in from fuse S13

T8e/5

Power out to N25 A/C Compressor Clutch

T8e/6

Input signal from E33 A/C Evaporator Temperature Switch (anti-icing) and J44 A/C Clutch Relay

T8e/7

Ground connection 193 in wiring harness

T8e/8

Power out to F87 After Run Coolant Fan Control Thermal Switch

LOW

Operation is by F18 Coolant Fan Control Thermal Switch Terminal 2 at approximately 95°C or when A/C is switched on through J32 A/C Relay. Operation is independent of J293 Coolant Fan Control Module.

MED

Operation is by F18 Coolant Fan Control Thermal Switch Terminal 1 at approximately 102°C and/or F129 A/C Pressure Switch at A/C high side pressure of approximately 15 Bar (221 psi). Operation is controlled by J293 Coolant Fan Control Module.

HIGH

Operation is only by F165 Third Speed Coolant Fan Thermal Switch at approximately 119°C. Operation is controlled by J293 Coolant Fan Control Module. High speed fan operation occurs at near overheat conditions only. Note that the A/C Compressor clutch will also disengage at approximately 112°C through F163 A/C Cut-Out Thermal Switch.

Coolant Circulation Pump, V50

9

Coolant Fan, V7

5-7

Coolant FC (Fan Control) Control Module J293

4-12

Coolant FC (Fan Control) Thermoswitch, F18

1-3

Coolant FC (Fan Control) Thermoswitch F87

10

ECT (Engine Coolant Temperature) Sensor, G2

11

Third Speed Coolant Fan Control Thermoswitch, F165

14