Battery Charging System Negative Contactor B Circuit

Check these first

• A failed negative contactor B in the battery charging system
• An open or short in the negative contactor B control wiring
• A corroded negative contactor B connector
• A control module driver fault on the negative contactor B output

What to do next

1. Scan all modules and read the negative contactor B command and state
2. Inspect the negative contactor B connector and wiring for damage
3. Test the negative contactor B control circuit for open and short faults
4. Measure the negative contactor B coil resistance
5. Replace negative contactor B if the circuit tests good and it will not switch
6. Clear the code and retest

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