Cadillac Fleetwood won't start despite battery replacement on Cadillac Fleetwood

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Cadillac Fleetwood owners report experiencing starting issues even after replacing the battery, often due to incorrect installation or excessive corrosion on the connectors. These problems can prevent the vehicle from starting altogether. Additionally, some owners find that a defective starter or a seized engine may be responsible for the starting failure. It's crucial for owners to ensure that the battery is fully charged, as unreliable tests can lead to misdiagnosis. In cases where the engine cranks but fails to start, or if there are intermittent starting problems, it may indicate issues with the electric battery or alternator. Furthermore, after any power loss, such as disconnecting the battery, some owners discover that calibrating the electronic throttle control is essential for proper engine operation. Checking these components and performing necessary tests or calibrations can help diagnose and resolve the starting issues with the Cadillac Fleetwood.

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