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.
Circuit/System Testing : Notes
Ignition ON and headlamps OFF, with a test lamp connected to ground, probe each of the test points on the DRL 1 fuse while commanding the DRL ON and OFF with a scan tool. The test lamp should illuminate at one or both of the fuse test points.
- If the test lamp does not illuminate at either test point, refer to DRL Relay Circuit Test .
- If the test lamp illuminates, refer to DRL Circuit Test .
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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.