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.
2012 Ford Mustang V6-3.7LFACTORY OEM SERVICE PROCEDURE
Relay Box
- Application and ID
- Locations
- Diagrams
- C2280A Smart Junction Box (SJB)
- C2280B Smart Junction Box (SJB)
- C2280C Smart Junction Box (SJB)
- C2280D Smart Junction Box (SJB)
- C2280E Smart Junction Box (SJB)
- C2280F Smart Junction Box (SJB)
- C2280G Smart Junction Box (SJB)
- C1035A Battery Junction Box (BJB)
- C1617A High Current Battery Junction Box (BJB)
- C1617B High Current Battery Junction Box (BJB)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.