2000 Crown Victoria Dual-Speed Electric Fan Relay Wiring Diagram & Wire Colors

This hand-drawn wiring diagram shows how to wire an electric cooling fan using two relays (a high-speed relay and a low-speed relay) with a 12V battery source. Power comes from a constant 12V feed through a 50 Amp Maxi-Fuse, with a 30 amp circuit breaker also shown in the circuit. An A/C high pressure switch (wire color Grn/Orn) ties into the circuit. A legend titled '2000 CV Relay Center Colors' lists the factory wire colors for both relays: High Speed Relay — Pin 3/30 RD/BK, Pin 5/87 OG/LB, Pin 2/86 LG/VT, Pin 1/85 RD; Low Speed Relay — 30 YE, 87 YE/LB, 86 RD/LB, 85 BK. A note instructs the builder to hook High Relay pin 86 and Low Relay pin 85 to an ON/ON switch with the center connector going to a ground source so only one relay can be active at a time. Another note states that pins 85 and 86 are reversed for the relay control center's existing wires. Both relays feed the fan, drawn at the lower right. Readers can learn the relay pinouts, wire colors, fusing, and switching logic for a dual-speed fan relay modification based on the 2000 Crown Victoria relay center.