Ford Workshop Service and Repair Manuals > F 450 2WD Super Duty V8-5.4L SOHC VIN L (2003) > Powertrain Management | Relays and Modules - Powertrain Management | Relays and Modules - Computers and Control Systems | Engine Control Module | Component Information | Diagrams

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Engine Control Module: Service Precautions

CAUTION: Always disconnect the battery ground cable prior to working on the electronic engine controls.

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