Normal Operation
WARNING: This page is about a different car, the 2013 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- DTC B1318 (Battery Voltage Low) - this DTC sets in continuous memory or on-demand in the Trailer Brake Control (TBC) module when the TBC module detects that battery voltage has dropped below 9 volts on the voltage supply circuit while not braking.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Charging system concern
- TBC module