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.
1999 Chevrolet Cutaway 7.4 JFACTORY OEM SERVICE PROCEDURE
Test H: All Power Door Locks Do Not Lock
- Remove power door lock relay located behind right kick panel. Connect test light between ground and power door lock relay terminal "C" (Orange wire). If test light illuminates, go to next step. If test light does not illuminate, repair open circuit in Orange wire between power door lock relay and splice S228.
- Connect test light between ground and power door lock relay terminal "F" (Light Blue wire). If test light illuminates, replace power door lock relay. If test light does not illuminate, repair open circuit in Light Blue wire between power door lock relay and splice S241.
Factory Service Tools
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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.
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