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.
2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
System Description
WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Power is supplied at all times
- through 10A fuse [No. 20, located in fuse block (J/B)]
- to stop lamp switch terminal 1, and
- to stop lamp relay terminals 2 and 3 (with hill descent control and hill start assist).
When the brake pedal is pressed, the stop lamp switch is closed and power is supplied
- through stop lamp switch terminal 2
- to rear combination lamp LH and RH terminal 2
- to high-mounted stop lamp terminal 1
- to ABS actuator and electric unit (control unit) terminal 41.
Ground is supplied
- to rear combination lamp LH terminal 5
- through grounds B7 and B19, and
- to high-mounted stop lamp terminal 2
- through grounds D406 and D504, and
- to rear combination lamp RH terminal 5
- through grounds B117 and B132.
With power and ground supplied, the stop lamps illuminate.
Factory Service Tools
Use the Manual With the Right Hardware
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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.