What fuse powers the fog lamp relay circuit?

The diagram shows a hot-at-all-times feed from fuse 9 (15A) in the Battery Junction Box (page 13-3) on circuit 474 OG/LG. The Central Junction Box side of the circuit uses fuses 26 (10A), 28 (10A), and 27 (5A).

What wire color feeds the fog lamps themselves?

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

Where is the fog lamp relay located?

The Fog Lamp Relay is shown inside the Battery Junction Box.

How do the fog lamps get their ground?

Both fog lamps ground on circuit 57 BK, joining at splice S104 and running to ground G103 (see Grounds page 10-6). The Main Light Switch grounds through S204 to G200 (page 10-5), and another 57 BK ground goes through S105 to G102.

When do the fog lamps receive power according to the annotations?

A handwritten note states power comes from the MFS (multi-function switch) in the low position only, and the brown wire is identified as the parking lamp circuit.

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Ford Fog Lamps Wiring Diagram 086-002 - Fog Lamp Relay, Switch & Circuits

Fog lamp wiring diagram with fog lamp relay, central junction box, switch, and left/right fog lamps

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Wiring diagram for fog lamps showing the fog lamp relay, central and battery junction boxes, switch, and left/right fog lamps with annotations.

Part of 2005-2014 Ford Mustang Wiring Diagrams

AI caption April 2009 · Photo 830 of 4866

This document is a Ford factory-style wiring diagram, page "086-002 Fog Lamps," showing the complete fog lamp circuit. Power enters on circuit 13 RD/BK from connector C214 (page 86-1) into the Central Junction Box, which contains fuses 26 (10A), 28 (10A), and 27 (5A, highlighted). A second hot-at-all-times feed comes from fuse 9 (15A) in the Battery Junction Box (page 13-3) via circuit 474 OG/LG, which also feeds the Daytime Running Lamps (DRL) resistor (page 97-2) through connector C142. The Fog Lamp Relay, located in the Battery Junction Box, directs power on circuit 478 TN/OG through splice S147 to the Left Fog Lamp (C144) and Right Fog Lamp (C134), which ground on circuit 57 BK through S104 to G103. The Main Light Switch (page 13-17, switch testing on page 149-1) energizes the relay via circuit 275 YE through connectors C160M/C160F and C246, and includes the Fog On indicator; switch grounds run through S204 to G200 and S105 to G102. Handwritten annotations note that power comes from the MFS (multi-function switch) in the low position only, that the brown wire is the parking lamp circuit, and that a section "can remove after splice." Wire colors, splice points, connector numbers, and ground locations are all identified.

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Frequently asked questions

What fuse powers the fog lamp relay circuit?: The diagram shows a hot-at-all-times feed from fuse 9 (15A) in the Battery Junction Box (page 13-3) on circuit 474 OG/LG. The Central Junction Box side of the circuit uses fuses 26 (10A), 28 (10A), and 27 (5A).
What wire color feeds the fog lamps themselves?: Circuit 478 TN/OG (tan/orange) runs from the Fog Lamp Relay through splice S147 to the left fog lamp (connector C144) and right fog lamp (connector C134).
Where is the fog lamp relay located?: The Fog Lamp Relay is shown inside the Battery Junction Box.
How do the fog lamps get their ground?: Both fog lamps ground on circuit 57 BK, joining at splice S104 and running to ground G103 (see Grounds page 10-6). The Main Light Switch grounds through S204 to G200 (page 10-5), and another 57 BK ground goes through S105 to G102.
When do the fog lamps receive power according to the annotations?: A handwritten note states power comes from the MFS (multi-function switch) in the low position only, and the brown wire is identified as the parking lamp circuit.