Intermittent SRS Light Diagnosis & Repair on a 2018 Dodge Challenger (No Parts Needed)

Initial Diagnosis and Intermittent Issue

• 💡 The video addresses an intermittent SRS (Supplemental Restraint System) warning light on a 2018 Dodge Challenger.
• ⚠️ The issue is intermittent, meaning the light is not always on, making diagnosis more challenging.
• 🎯 A previous P0128 thermostat code was resolved with a new thermostat and a successful drive cycle.

Investigating the SRS Code

• ⚡ The SRS light came on during a test drive, triggering a "B212D-13 Ignition Run Only Input Circuit Open" code.
• 📉 Live data showed a loss of ignition voltage, which was concerning as the code remained active.
• 🐌 Communication speed with the scan tool was noted as unusually slow, even after restarting the tool and VCI module.

Fuse Box Inspection and Voltage Fluctuation

• 🔍 The fuse box, located in the trunk, was accessed to check relevant fuses (65 and 58) for the ignition run circuits.
• 📈 Voltage readings fluctuated significantly, dropping to near 0 volts and then returning, indicating a connection problem.
• 🔧 Evidence of previous tampering, such as removed relays and greasy fingerprints, was observed around the fuse box.

Pinpointing the Faulty Connection

• 🎯 A pin drag test was performed on fuses 58 (Ignition Run Control) and 65.
• ⚠️ Fuse 58 felt loose and showed a lack of drag on the load side, confirming a poor connection.
• 💡 Upon lifting the fuse box, a spread terminal in the receptacle for fuse 58 was discovered, causing the intermittent voltage loss.

Repair and Resolution

• ✅ The spread terminal was carefully adjusted using a pick tool to restore a solid connection.
• 🛠️ The repair required no new parts, highlighting the importance of thorough diagnostic procedures.
• ✨ With the terminal fixed, voltage readings stabilized, and the SRS light was resolved, confirming the fix.
• 🚗 The vehicle's "money light" (thermostat issue) was also previously fixed, leaving the Challenger fully repaired.