What wire colors are used for the skid control module wheel sensor circuits?

Circuit 604 (R.H. wheel sensor high) is yellow, 605 (R.H. low) is brown, 606 (L.H. high) is yellow, and 607 (L.H. low) is brown.

What color is the alternator shunt "A" terminal to ammeter wire (circuit 654)?

Yellow with a black stripe. Circuit 655, starter motor relay shunt to ammeter, is red with an orange stripe.

What are the wire colors for the dual fuel tank selector switch circuits?

Circuit 672 (selector sw. to left hand pump motor) is brown, 673 (left fuel gauge) is green, 674 (right hand pump motor) is brown-white stripe, 675 (right fuel gauge) is green-red stripe, and 680 (selector switch to midship fuel tank) is blue.

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Ford Standard Wire Color Code Chart - Circuits 594-697 (1979 Bronco Wiring)

Standard Wire Color Code Chart, circuits 594-697, skid control and tractor-trailer

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Wire color code page covering circuits 594-697: oil pressure safety, fuel pump primer, brake skid control module wheel sensors, EGR valve, fuel gauge and tractor-trailer controller circuits.

AI caption February 2013 · Photo 54 of 104

This document is one page of a Ford 'Standard Wire Color' code reference chart, listing circuit numbers 594 through 697 with each circuit's description and its standard wire color (including stripe colors). The circuits cover a wide range of vehicle systems: temperature transmitters and warning lamps, oil pressure safety and fuel pump primer switches, brake skid control (anti-skid) module wiring including wheel sensors and failure modules, EGR valve, speed sensor, oil and water temperature warning relays and lamps, tachometer and ignition coil circuits, ammeter shunt wiring, dual fuel tank selector switch/pump motor/fuel gauge wiring, tractor-trailer relay and marker lamp circuits, heated backlite switch, hydro-boost warning lamp, speed regulator (cruise) switch, and turn signal flasher circuits. For each circuit number, a reader can look up the standard factory wire color (e.g., circuit 640, ignition switch coil terminal to warning lamps, is red with yellow stripe; circuit 654, alternator shunt "A" terminal to ammeter, is yellow with black stripe). This page is part of a multi-page wiring color code set uploaded alongside other 1979 Ford Bronco wiring diagrams and connector references, useful for identifying and tracing factory harness wires by circuit number and color.

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Frequently asked questions

What color is Ford circuit 640 (ignition switch coil terminal to warning lamps)?: Red with a yellow stripe.
What wire colors are used for the skid control module wheel sensor circuits?: Circuit 604 (R.H. wheel sensor high) is yellow, 605 (R.H. low) is brown, 606 (L.H. high) is yellow, and 607 (L.H. low) is brown.
What color is the alternator shunt "A" terminal to ammeter wire (circuit 654)?: Yellow with a black stripe. Circuit 655, starter motor relay shunt to ammeter, is red with an orange stripe.
What are the wire colors for the dual fuel tank selector switch circuits?: Circuit 672 (selector sw. to left hand pump motor) is brown, 673 (left fuel gauge) is green, 674 (right hand pump motor) is brown-white stripe, 675 (right fuel gauge) is green-red stripe, and 680 (selector switch to midship fuel tank) is blue.
What color is the heated backlite switch circuit (688)?: Gray with a blue stripe.