What wire color feeds the trunk light on the 1987 LTD Crown Victoria?

The trunk light is fed by an LT GRN-YEL wire from Fuse #3.

What resistance values are used in the steering wheel cruise control switches?

The steering wheel switches use 2,200 Ω for RESUME, 120 Ω for COAST, and 680 Ω for SET/ACCEL.

Which fuse powers the hazard flasher circuit?

The hazard flasher is fed by Fuse #1 via an LT GRN-RED wire; the directional flasher is located in the fuse block on an LT BLU wire.

What wire colors go to the rear directional (turn) lights?

ORG-LT BLU goes to the right rear directional light and LT GRN-ORG goes to the left, with the same colors feeding the trailer directional light relays.

What wire color runs the taillight and marker lamp circuits?

BRN (brown) wires feed the right/left taillights, rear marker lights, front parking lights, coach lights, license lights, and trailer exterior light relays.

What wires connect to the cruise control amplifier?

The cruise control amplifier connects to BLK (ground), LT GRN, WHT-PPL, DK GRN-WHT, GRY-BLK, WHT-PNK, ORG-YEL, YEL-RED, PNK-LT BLU, and BRN-LT GRN wires, with the cruise control servo shown as a 50,000 Ω unit with vacuum and vent connections.

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1987 Ford LTD Crown Victoria Wiring Diagram - Underdash & Instrument Panel

Underdash & Instrument Panel Wiring Diagram (Fig 5, Cont), 1987 Ford LTD Crown Victoria

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Mitchell wiring diagram Fig. 5 for the 1987 Ford LTD Crown Victoria underdash and instrument panel, covering clock, warning buzzer, directional/hazard flasher, multi-function switch, cruise control and parking/marker lamps.

Part of 1983-1991 Ford LTD Crown Victoria Wiring Diagrams

AI caption April 2007 · Photo 1739 of 3817

This document is a scanned Mitchell Repair Information wiring diagram, labeled 'Fig. 5: Underdash (Cont.) & Instrument Panel' for a 1987 Ford LTD Crown Victoria. It covers the instrument panel and underdash circuits, including the auto lamp relay and light sensor amplifier, key warning switch and warning buzzer, headlight/light switch with dimmer, dome and courtesy lamps, illuminated entry timer, clock, exterior lighting circuits (front parking, coach, taillights, rear marker, license, and trailer exterior lamp relays, with variations shown for Crown Victoria sedan/station wagon and Grand Marquis sedan/station wagon), LCD dimming relay and instrument cluster illumination, front cigar lighter, hazard flasher and directional flasher, multi-function switch, passing beam/dimmer switch and headlights, stop lamp switch and high-level stop lamp, steering wheel switches with resistance values (2,200 Ω resume, 120 Ω coast, 680 Ω set/accel), horn relay, speed sensor, Tripminder module, and cruise control amplifier and servo (50,000 Ω). Wire colors (e.g., BRN, LT GRN-YEL, WHT-PPL, RED-YEL) and fuse references (#1, #3, #4, #6, #8, #10, #11, #13, #16, #18) are labeled throughout. A reader can trace circuit paths, wire color codes, connector pin numbers, and fuse feeds for these dash-area systems.

This document covers 1987, which may differ from this 1985 Ford LTD Crown Victoria.

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Frequently asked questions

What wire color feeds the trunk light on the 1987 LTD Crown Victoria?: The trunk light is fed by an LT GRN-YEL wire from Fuse #3.
What resistance values are used in the steering wheel cruise control switches?: The steering wheel switches use 2,200 Ω for RESUME, 120 Ω for COAST, and 680 Ω for SET/ACCEL.
Which fuse powers the hazard flasher circuit?: The hazard flasher is fed by Fuse #1 via an LT GRN-RED wire; the directional flasher is located in the fuse block on an LT BLU wire.
What wire colors go to the rear directional (turn) lights?: ORG-LT BLU goes to the right rear directional light and LT GRN-ORG goes to the left, with the same colors feeding the trailer directional light relays.
What wire color runs the taillight and marker lamp circuits?: BRN (brown) wires feed the right/left taillights, rear marker lights, front parking lights, coach lights, license lights, and trailer exterior light relays.
What wires connect to the cruise control amplifier?: The cruise control amplifier connects to BLK (ground), LT GRN, WHT-PPL, DK GRN-WHT, GRY-BLK, WHT-PNK, ORG-YEL, YEL-RED, PNK-LT BLU, and BRN-LT GRN wires, with the cruise control servo shown as a 50,000 Ω unit with vacuum and vent connections.