Vehicle Communication Bus F - Shorted to Bus F +

Check these first

• The bus F (+) and bus F (-) wires pinched together
• Insulation worn through where the bus F lines share a loom
• Solder or corrosion bridging bus F (+) to bus F (-)
• A module internally shorting bus F (+) to bus F (-)

What to do next

1. Read stored codes on every module that shares bus F
2. Disconnect modules on bus F one at a time and watch for the short to clear
3. Ohm between bus F (+) and bus F (-) with the battery disconnected
4. Repair the pinched or chafed section where the bus F lines touch
5. Replace the module that clears the short when disconnected
6. Clear the code and retest

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