Brake Switch B Circuit Low

Where it lives

For P0719, the switch sits on the circuit this code reports. The description of P0719 reports a fault at the switch.

Check these first

• A short to ground in the brake switch B circuit
• A brake switch B stuck closed
• Corrosion or water in the switch B connector
• A poor ground on the brake switch B circuit

What to do next

1. Check battery voltage and the brake switch B feed
2. Inspect the brake switch B wiring for a short to ground
3. Test the switch B ground for a weak connection
4. Monitor the brake switch B state on a scan tool
5. Replace brake switch B if the signal stays low
6. Clear the code and retest

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