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1994 Ford Bronco/F-Series EVTM - Wire Color Codes & Troubleshooting Steps
Ford 1994 Bronco/F-Series EVTM reference page (2-2): how to read wiring schematics, connector-numbering rules, standard Ford wire color abbreviations and electrical troubleshooting steps.
This is page 2-2, "How to Use This Manual," from the 1994 Ford Bronco/F-Series Electrical and Vacuum Troubleshooting Manual (EVTM). The page continues "Helpful Reminders," explaining how connector numbers are assigned when connectors are shared between versions (e.g., EFI/Carb), and how wiring schematics show circuit power, current path, and grounding. It provides the standard Ford wire color abbreviation legend (BL Blue, BK Black, BR Brown, DB Dark Blue, DG Dark Green, GN Green, GY Gray, LB Light Blue, LG Light Green, N Natural, O Orange, PK Pink, P Purple, R Red, T Tan, W White, Y Yellow), with a note that when a wire has two colors, the first is the base color and the second is the stripe. It directs readers to Cell 160 for reporting Vehicle Repair Location Codes (not Cell 151). A boxed warnings section lists safety precautions: safety glasses, safety stands, ignition off, park brake set, ventilation for carbon monoxide, avoiding moving parts and hot components, no flames or smoking near the battery, and removing jewelry. The right column begins "How to Find Electrical Concerns," outlining troubleshooting Steps 1-4: verify the concern, narrow it using the EVTM and schematics, test the cause with electrical procedures and the Location Index, and verify the cause with jumper wires or known-good components.
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Frequently asked questions
- What do Ford wire color abbreviations like DB, LG, and PK mean?
- Per the color abbreviation table: DB = Dark Blue, LG = Light Green, PK = Pink. Others include BL Blue, BK Black, BR Brown, DG Dark Green, GN Green, GY Gray, LB Light Blue, N Natural, O Orange, P Purple, R Red, T Tan, W White, Y Yellow.
- What does it mean when a Ford wire is labeled with two colors?
- The first color listed is the basic color of the wire, and the second color listed is the stripe marking of the wire.
- Where do I find Vehicle Repair Location Codes in this manual?
- Refer to Cell 160 (beginning on page 160-1). Do not use the illustrations in Cell 151 (beginning on page 151-1) for reporting Vehicle Repair Location Codes.
- What transmission position should the vehicle be in when working on it?
- Set the park brake; an automatic transmission should be in PARK and a manual transmission should be in NEUTRAL.
- What are the first troubleshooting steps for electrical concerns?
- Step 1: Verify the concern by operating the complete system to check the customer's complaint. Step 2: Narrow the concern using the EVTM, reading component description notes and studying the wiring schematic. Step 3: Test the cause with electrical test procedures. Step 4: Verify the cause using jumper wires and/or a known good component.
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