Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1999MUSTANG GT, 2D CONVERTIBLE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESMODULE COMMUNICATIONS NETWORKSYSTEM TESTSNOTES
1999 Ford Mustang GT, 2D Convertible, Standard
System Tests: Notes
1999 Ford Mustang GT, 2D Convertible, StandardSECTION Notes
NOTE:
Before performing any system tests, inspect Data Link Connector (DLC) for loose, damaged or corroded terminals. Pay particular attention to terminals No. 2 (Tan/Orange wire), No. 7 (Light Blue/White wire) and No. 10 (Pink/Light Blue wire).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.