SuperMotors SuperMotors SUPERMOTORS Search — try “orange Bronco on 35s”
Home/ Registry/ Mercury/ Cougar/ 1989-1997/ 1997 Mercury Cougar/ Photo supermotors.net/registry/media/621500

Ford C255 Electronic Instrument Cluster Connector Pinout & Wire Colors

Connector pinout for the C255 electronic instrument cluster listing pin numbers, color-coded circuits, and functions.

AI caption · Photo 12 of 86

This document is a connector pinout reference for connector C255, the electronic instrument cluster connector. It includes a diagram of the 18-pin connector showing the physical arrangement of pins (1 and 18 at the top corners, 9 and 10 at the bottom), with each wire's circuit number and color code labeled on either side. Below the diagram, a table lists all 18 pin positions with their circuit number, wire color abbreviation, and circuit function. Functions covered include the Electronic Engine Control (EEC) module signal, power to warning indicators, brake fluid level switch, high beam indicator, left and right turn signal indicators, ground, seat belt warning, anti-lock brake control module indicator, door ajar indicator, ignition switch to IAR resistor, alternator, power to and for LCD lamps, and anti-theft indicator ground and power. Pin 7 is marked 'Open' and pin 10 is 'NOT USED.' Wire colors include PK/LG, R/Y, P/W, LG/BK, LG/W, BK, LB/R, W/LB, Y, LG/Y, DB/LG, BK/PK, P/O, LG/R, GY/Y, and BK/O. A reader can use this document to identify wire functions and colors when diagnosing or repairing electronic instrument cluster wiring at connector C255.

Is this accurate? Sign in to help verify it.

Frequently asked questions

What is connector C255?
C255 is the connector for the electronic instrument cluster. It is an 18-pin connector, and the document lists each pin's circuit number, wire color, and function.
Which pin on C255 is ground?
Pin 6, circuit 57 (BK, black wire), is Ground. Pin 17, circuit 343 (DB/LG), is the Anti-theft Indicator Ground.
Which C255 pins are for the turn signal indicators?
Pin 5, circuit 3 (LG/W), is the Left Turn Signal Indicator, and pin 8, circuit 2 (W/LB), is the Right Turn Signal Indicator.
What wire connects the C255 cluster to the EEC module?
Pin 1, circuit 658 with a PK/LG (pink/light green) wire, goes to the Electronic Engine Control (EEC) Module.
Are any pins on C255 unused?
Yes. Pin 7 (circuit 19, LB/R) is listed as 'Open' and pin 10 has no circuit and is marked 'NOT USED.'

Comments

No comments yet.

More from this build

1997 Mercury Cougar with custom chrome wheels and lowered suspension Engine bay with large ribbed intake hose and alternator Engine bay with alternator, spark plug wires, and fuel injectors visible Engine bay shot showing alternator, spark plug wires, and hoses. Supermotors.net logo visible Differential housing with gears and bearing, showing red-circled bolt holes Differential carrier with a bolt highlighted in a red box, showing internal gears and a bearing race Close-up of differential gears with a red box highlighting a washer Brake caliper bracket bolt and C-shaped washer on concrete

More 1989-1997 Cougars