What fuse powers the auxiliary cooling fan motor?

The AUX FAN fuse, rated 30 A, located in the Underhood Fuse Block (positions H9/J10). It is hot at all times and feeds terminal 30 of the Auxiliary Cooling Fan Relay via a 1 ORN wire, circuit 1540.

What controls the auxiliary cooling fan relay?

The Vehicle Control Module (VCM). Relay terminal 88 connects via a 0.8 DK BLU wire (circuit 473) to VCM connector C4, pin 9, labeled Auxiliary Cooling Fan Relay Control.

What wire runs from the relay to the fan motor?

A 1 RED wire, circuit 702, from relay terminal 87 through connector C101 (pin A) to terminal B of the Auxiliary Cooling Fan Motor.

How is the auxiliary cooling fan motor grounded?

From motor terminal A, a 1 BLK wire (circuit 250) runs to splice S128, then a 2 BLK wire (circuit 250) runs to ground G112.

Which fuse feeds the relay coil?

The A/C COMP fuse, 10 A (positions K11/L12), hot in RUN and START, feeding relay terminal 85 via a 0.8 ORN wire, circuit 1240.

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Auxiliary Cooling Fan Relay & Motor Wiring Diagram - VCM Controlled, Fuse Block

Wiring diagram for auxiliary cooling fan relay and motor with color-coded wires and circuit numbers

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Reference · 1984-1990 Bronco IIAll 1 wiring diagrams

Auxiliary Cooling Fan Relay & Motor Wiring Diagram - VCM Controlled, Fuse Block

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Wiring diagram of the auxiliary cooling fan relay and motor circuit with color-coded wires, circuit numbers and connector references.

Part of 1984-1990 Ford Bronco II Wiring Diagrams

AI caption April 2010 · Photo 60 of 66

This document is a single-page electrical schematic for an auxiliary (electric) engine cooling fan circuit. It shows power originating in the Underhood Fuse Block from two fuses: a 30 A AUX FAN fuse (hot at all times, positions H9/J10) and a 10 A A/C COMP fuse (hot in RUN and START, positions K11/L12). The 10 A fuse feeds the Auxiliary Cooling Fan Relay coil at terminal 85 via a 0.8 ORN wire (circuit 1240); the relay coil's other side (terminal 88) is controlled by the Vehicle Control Module (VCM) through a 0.8 DK BLU wire (circuit 473) at connector C4, pin 9 (Auxiliary Cooling Fan Relay Control). The 30 A fuse feeds relay terminal 30 via a 1 ORN wire (circuit 1540). When energized, relay terminal 87 sends power on a 1 RED wire (circuit 702) through connector C101 pin A to terminal B of the Auxiliary Cooling Fan Motor. The motor grounds through a 1 BLK wire (circuit 250) to splice S128, then a 2 BLK wire (250) to ground G112. Cross-references point to Power Distribution and Ground Distribution schematics. A reader can trace the complete fan circuit, fuse ratings, relay pinout, wire colors/gauges, circuit numbers, and connector/ground locations.

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Frequently asked questions

What fuse powers the auxiliary cooling fan motor?: The AUX FAN fuse, rated 30 A, located in the Underhood Fuse Block (positions H9/J10). It is hot at all times and feeds terminal 30 of the Auxiliary Cooling Fan Relay via a 1 ORN wire, circuit 1540.
What controls the auxiliary cooling fan relay?: The Vehicle Control Module (VCM). Relay terminal 88 connects via a 0.8 DK BLU wire (circuit 473) to VCM connector C4, pin 9, labeled Auxiliary Cooling Fan Relay Control.
What wire runs from the relay to the fan motor?: A 1 RED wire, circuit 702, from relay terminal 87 through connector C101 (pin A) to terminal B of the Auxiliary Cooling Fan Motor.
How is the auxiliary cooling fan motor grounded?: From motor terminal A, a 1 BLK wire (circuit 250) runs to splice S128, then a 2 BLK wire (circuit 250) runs to ground G112.
Which fuse feeds the relay coil?: The A/C COMP fuse, 10 A (positions K11/L12), hot in RUN and START, feeding relay terminal 85 via a 0.8 ORN wire, circuit 1240.