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 MANUALSFORD1999RANGER 2WD V6-3.0L VIN UREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSTESTING AND INSPECTIONMODULE CONFIGURATIONINSPECTION AND VERIFICATION (START HERE)
1999 Ford Ranger 2WD V6-3.0L VIN U
Inspection and Verification (Start Here)
1999 Ford Ranger 2WD V6-3.0L VIN USECTION Inspection and Verification (Start Here)
1. visually inspect for obvious signs of electrical damage. Refer to the following chart:
VISUAL INSPECTION CHART
Electrical
^ Central Junction Box (CJB) Fuse 5 (10 A)
^ Damaged wiring harness
^ Loose or corroded connectors
^ 4-wheel anti-lock brake control module
^ GEM/CTM
^ PATS Module
2. If the concern remains after inspection, connect the New Generation STAR (NGS) Tester to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from NGS Tester menu. If NGS Tester does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch is in RUN position.
If the NGS Tester still will not communicate with the vehicle, refer to Module Communication Network. System Precheck
3. Refer to the Symptom Chart. Symptom Chart
VISUAL INSPECTION CHART
Electrical
^ Central Junction Box (CJB) Fuse 5 (10 A)
^ Damaged wiring harness
^ Loose or corroded connectors
^ 4-wheel anti-lock brake control module
^ GEM/CTM
^ PATS Module
2. If the concern remains after inspection, connect the New Generation STAR (NGS) Tester to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from NGS Tester menu. If NGS Tester does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch is in RUN position.
If the NGS Tester still will not communicate with the vehicle, refer to Module Communication Network. System Precheck
3. Refer to the Symptom Chart. Symptom Chart
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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.