What fuse powers the fog lamp relay circuit?

Fuse 9 (15A) in the Power Distribution Box (page 13-3) provides constant power on circuit 474 O/LG to the Fog Lamp Relay and the DRL Module; the control side runs through fuse 27 (5A) in the Junction Box Fuse/Relay Panel (page 13-16).

What wire color feeds the fog lamps when the relay is closed?

Circuit 478 T/O (tan/orange) runs from the Fog Lamp Relay through splice S147 to both the left fog lamp (connector C144) and right fog lamp (connector C134).

Where do the fog lamps get their ground?

Both fog lamps ground through circuit 57 BK via splice S104 to ground G103 (see grounds page 10-5); the switch/indicator side grounds through S204 to G200 (see grounds page 10-4).

Which connectors are in the fog lamp control circuit?

The diagram shows C246 and C244 at the Main Light Switch, C259 at the Multi-Function Switch, C253M/C253F, C243 at the fuse/relay panel, C158M/C158F, C160M/C160F, C142 at the DRL module, and C144/C134 at the fog lamps.

How do I test the switches in this circuit?

The diagram directs you to page 149-1 for Main Light Switch testing and page 149-4 for Multi-Function (dimmer) Switch testing.

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1997 Ford Fog Lamps Wiring Diagram 086-001 - Fog Lamp Relay & DRL Circuit

Fog lamps wiring diagram 086-001 with fog lamp relay, switch and left/right fog lamps

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Automotive wiring diagram for the fog lamps showing the fog lamp relay, main light switch and left and right fog lamps with color-coded circuits.

Part of 2005-2014 Ford Mustang Wiring Diagrams

AI caption April 2009 · Photo 844 of 4866

This document is page 086-001, a Ford fog lamp circuit wiring diagram. It shows two 'HOT AT ALL TIMES' power feeds: one through the Main Light Switch (page 13-17) with circuit 15 R/Y feeding the autolamps circuit (page 87-2), and one through fuse 9 (15A) in the Power Distribution Box (page 13-3) via circuit 474 O/LG to the Daytime Running Lamps (DRL) Module (page 97-2) and the Fog Lamp Relay. The Multi-Function (dimmer) Switch feeds circuit 13 R/BK through connectors C253M/C253F to the Junction Box Fuse/Relay Panel (page 13-16) fuse 27 (5A), which outputs circuit 188 W/BK through C158M/C158F, then 275 Y through C160M/C160F to the fog lamp on-indicator and Main Light Switch fog contacts, energizing the Fog Lamp Relay. When the relay closes, circuit 478 T/O feeds splice S147 to the Left Fog Lamp (C144) and Right Fog Lamp (C134). Grounds are via circuit 57 BK: switch/indicator side through S204 to G200 (grounds page 10-4) and lamp side through S104 to G103 (grounds page 10-5). Switch testing references are pages 149-1 and 149-4.

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Frequently asked questions

What fuse powers the fog lamp relay circuit?: Fuse 9 (15A) in the Power Distribution Box (page 13-3) provides constant power on circuit 474 O/LG to the Fog Lamp Relay and the DRL Module; the control side runs through fuse 27 (5A) in the Junction Box Fuse/Relay Panel (page 13-16).
What wire color feeds the fog lamps when the relay is closed?: Circuit 478 T/O (tan/orange) runs from the Fog Lamp Relay through splice S147 to both the left fog lamp (connector C144) and right fog lamp (connector C134).
Where do the fog lamps get their ground?: Both fog lamps ground through circuit 57 BK via splice S104 to ground G103 (see grounds page 10-5); the switch/indicator side grounds through S204 to G200 (see grounds page 10-4).
Which connectors are in the fog lamp control circuit?: The diagram shows C246 and C244 at the Main Light Switch, C259 at the Multi-Function Switch, C253M/C253F, C243 at the fuse/relay panel, C158M/C158F, C160M/C160F, C142 at the DRL module, and C144/C134 at the fog lamps.
How do I test the switches in this circuit?: The diagram directs you to page 149-1 for Main Light Switch testing and page 149-4 for Multi-Function (dimmer) Switch testing.