What wire color is the horn circuit at the clockspring plug?

Blue at the clockspring plug, and also Blue at the plug under the dash.

Which wire carries the cruise control signal through the clockspring?

The Light Blue/Black Stripe wire is labeled Cruise on both the clockspring plug and the under-dash plug.

What is the ground wire color at each connector?

At the clockspring plug the ground is Black; at the plug under the dash the ground is Green/Orange Stripe.

Which wires are for the steering wheel radio and EATC controls?

Radio is Blue/Red Stripe at the clockspring plug and Light Blue/Red Stripe at the under-dash plug. EATC is Orange/Black Stripe at the clockspring plug and Brown/Light Blue Stripe at the under-dash plug.

What does the chime circuit connect to, and what color is it?

The 'Chime when Key in Ignition' circuit is Black/Purple Stripe at the clockspring plug and Black/Violet Stripe at the plug under the dash.

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Mercury Grand Marquis Redundant Controls Clockspring Wiring Pinout Diagram

Connector pinout diagrams labeling wire colors and circuits for cruise, radio, horn

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Clockspring and under-dash connector pinout diagrams with wire colors and circuit functions.

AI caption December 2016 · Photo 1432 of 1442

This document is a hand-drawn wiring/pinout diagram showing two connectors related to steering wheel redundant controls: the Clockspring Plug (top) and the corresponding Plug Under Dash (bottom, outlined in red). For each connector, the diagram identifies terminal positions and matches them to circuit functions and wire colors. The clockspring plug shows: Not Used, Chime when Key in Ignition (Black/Purple Stripe), Cruise (Light Blue/Black Stripe), Radio (Blue/Red Stripe), Horn (Blue), Ground (Black), EATC (Orange/Black Stripe), and Illumination (Brown/Light Blue Stripe). The under-dash plug mirrors these circuits: Horn (Blue), Radio (Light Blue/Red Stripe), Cruise (Light Blue/Black Stripe), Chime when Key in Ignition (Black/Violet Stripe), Illumination (Orange/Black Stripe), EATC (Brown/Light Blue Stripe), Ground (Green/Orange Stripe), plus a Not Used terminal. A reader can use this diagram to identify which wire and terminal carries the horn, cruise control, steering-wheel radio (redundant) controls, EATC (Electronic Automatic Temperature Control) buttons, key-in-ignition chime, illumination, and ground signals when diagnosing, replacing, or swapping a clockspring or steering wheel with redundant controls. No year, make, model, part numbers, or fuse ratings are printed on the document itself.

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Frequently asked questions

What wire color is the horn circuit at the clockspring plug?: Blue at the clockspring plug, and also Blue at the plug under the dash.
Which wire carries the cruise control signal through the clockspring?: The Light Blue/Black Stripe wire is labeled Cruise on both the clockspring plug and the under-dash plug.
What is the ground wire color at each connector?: At the clockspring plug the ground is Black; at the plug under the dash the ground is Green/Orange Stripe.
Which wires are for the steering wheel radio and EATC controls?: Radio is Blue/Red Stripe at the clockspring plug and Light Blue/Red Stripe at the under-dash plug. EATC is Orange/Black Stripe at the clockspring plug and Brown/Light Blue Stripe at the under-dash plug.
What does the chime circuit connect to, and what color is it?: The 'Chime when Key in Ignition' circuit is Black/Purple Stripe at the clockspring plug and Black/Violet Stripe at the plug under the dash.