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.
Repair and Diagnosis: Service and Repair
This is the exact OEM manual section for the path above. Use the breadcrumb to move up or down the tree until you reach the precise year, make, model, and subsystem you need.
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PRINTED CIRCUIT BOARD (PCB) RELAYS
Printed circuit board (PCB) relays are an integeral part of the bussed electrical center or fuse block and cannot be repaired or replaced.
If any PCB relay needs to be repaired or replaced the bussed electrical center or fuse block must be replaced.
PCB relays can be identified using the fuse block label on most vehicles.
For PCB Relay diagnosis, refer to Vehicle / Testing and Inspection / Component Tests and General Diagnostics Printed Circuit Board (PCB) Relay Testing
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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.