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Home >> Ford >> 2003 >> Excursion 4WD V8-6.0L DSL Turbo >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Service Precautions
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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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