What is connector C115?

C115 is a 42-pin in-line connector pair, shown here as C115F (female) and C115M (male), with a pin-by-pin table listing the circuit number and wire color for each cavity.

Which pins in the C115 connector are unused?

Pins 10, 23, 32, 35, 38, and 41 are shown with dashes in the circuit tables, indicating no circuit is assigned to those cavities.

What circuit is on pin 8 of the C115 connector?

Pin 8 carries circuit 37 with a yellow (Y) wire on both the C115F and C115M sides.

What wire color is circuit 140 on pin 21?

Circuit 140 at pin 21 uses a black with pink stripe (BK/PK) wire.

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Ford C115 In-Line Connector Pinout - 42-Pin C115F & C115M Wire Circuit Chart

C115F and C115M in-line connector pinout drawings with pin-circuit chart

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Connector face views and pin-to-circuit chart for the C115F and C115M in-line connectors listing color-coded circuits.

AI caption March 2015 · Photo 75 of 343

This document is a connector pinout reference for the C115 in-line connector pair, showing both the female (C115F) and male (C115M) 42-pin connector faces with numbered cavity diagrams, followed by pin-to-circuit tables for each side. For every pin (1–42), the tables give the Ford circuit number and wire color code, e.g. pin 1 = circuit 16 (R/LG), pin 8 = circuit 37 (Y), pin 21 = circuit 140 (BK/PK), pin 22 = circuit 107 (P), and pin 42 = circuit 570 (BK/O). Several cavities are unused, indicated by dashes (pins 10, 23, 32, 35, 38, 41). Circuits marked with an asterisk — 511 (LG) at pin 4, 224 (T/W) at pin 12, 784 (LB/BK) at pin 29, and 911 (W/LG) at pin 40 — are footnoted as applying to automatic transmission (A/T) equipped vehicles only. A reader can use this page to identify which wire (by circuit number and color) occupies each cavity of the C115 bulkhead/in-line connector, useful for tracing engine harness circuits, diagnosing broken or corroded connector pins, and repairing wiring. The document itself does not state a year, model, or engine application; it was uploaded to a 1990 Ford F-250 gallery as part of a larger wiring diagram set.

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Frequently asked questions

What is connector C115?: C115 is a 42-pin in-line connector pair, shown here as C115F (female) and C115M (male), with a pin-by-pin table listing the circuit number and wire color for each cavity.
Which pins in the C115 connector are unused?: Pins 10, 23, 32, 35, 38, and 41 are shown with dashes in the circuit tables, indicating no circuit is assigned to those cavities.
What do the asterisks next to some circuits mean?: The footnote states '* A/T ONLY' — circuits *511 (LG) at pin 4, *224 (T/W) at pin 12, *784 (LB/BK) at pin 29, and *911 (W/LG) at pin 40 apply only to automatic transmission vehicles.
What circuit is on pin 8 of the C115 connector?: Pin 8 carries circuit 37 with a yellow (Y) wire on both the C115F and C115M sides.
What wire color is circuit 140 on pin 21?: Circuit 140 at pin 21 uses a black with pink stripe (BK/PK) wire.