What do the letter codes A through H mean in this Taurus wiring diagram?

They identify vehicle variants: A = electro-mechanical cluster without EATC, B = electro-mechanical cluster with EATC, C = electronic cluster (Flex Fuel only) without EATC, E = SHO M/T with EATC, F = SHO A/T with EATC, G = police package, H = standard production with electro-mechanical cluster. All unlabeled circuits are common to all variants.

What wire color and gauge is circuit 640?

Circuit 640 is R/Y (red/yellow), 20 gauge, code AH, and applies to variants ABEFGH.

Which circuit in this diagram applies only to the SHO with automatic transmission and EATC?

Circuit 911 W/LG 18 AZ is marked with code F, which the legend defines as "SHO" A/T with "EATC".

What wire circuits are listed on this page?

640 R/Y 20 AH, 450 DG/LG 20 AH, 911 W/LG 18 AZ, 38 BK/O 12 AZ, 186 BR/LB 12 AH, and 158 BK/PK 20 AH.

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1993 Ford Taurus Ignition Wiring Diagram Legend - SHO, EATC, Police Package Codes

Wiring diagram manual page with wire color codes and cluster circuit legend, frame 21 of 50

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Wiring diagram page listing color-coded wire callouts and a circuit legend for cluster/EATC/SHO/police variants, frame 21 of 50.

AI caption December 2009 · Photo 3252 of 5000

This document is a partial page (marked "FRAME 21 OF 50", page/grid reference 111) from a factory-style wiring diagram set, uploaded as part of an ignition wiring reference for a 1993 Ford Taurus. The visible portion shows a wiring diagram fragment listing six circuits with circuit number, wire color code, gauge, and connector/splice codes: 640 R/Y 20 AH (applies to variants ABEFGH), 450 DG/LG 20 AH, 911 W/LG 18 AZ (variant F), 38 BK/O 12 AZ, 186 BR/LB 12 AH, and 158 BK/PK 20 AH. Below the wiring fragment is a legend box (labeled "F") defining the vehicle-variant application codes used throughout the diagram: A = electro-mechanical cluster without EATC; B = electro-mechanical cluster with EATC; C = electronic cluster (Flex Fuel only) without EATC; E = SHO with manual transmission and EATC; F = SHO with automatic transmission and EATC; G = police package; H = standard production with electro-mechanical cluster. A note states "ALL UNLABELED CIRCUITS COMMON." A reader can learn which wiring circuits apply to which Taurus configuration (SHO, Flex Fuel, police package, EATC-equipped) and the wire colors/gauges for the listed circuits.

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Frequently asked questions

What do the letter codes A through H mean in this Taurus wiring diagram?: They identify vehicle variants: A = electro-mechanical cluster without EATC, B = electro-mechanical cluster with EATC, C = electronic cluster (Flex Fuel only) without EATC, E = SHO M/T with EATC, F = SHO A/T with EATC, G = police package, H = standard production with electro-mechanical cluster. All unlabeled circuits are common to all variants.
What wire color and gauge is circuit 640?: Circuit 640 is R/Y (red/yellow), 20 gauge, code AH, and applies to variants ABEFGH.
Which circuit in this diagram applies only to the SHO with automatic transmission and EATC?: Circuit 911 W/LG 18 AZ is marked with code F, which the legend defines as "SHO" A/T with "EATC".
What wire circuits are listed on this page?: 640 R/Y 20 AH, 450 DG/LG 20 AH, 911 W/LG 18 AZ, 38 BK/O 12 AZ, 186 BR/LB 12 AH, and 158 BK/PK 20 AH.
What frame of the diagram set is this page?: It is marked FRAME 21 OF 50.