Buick LeSabre battery dies after replacement, possible hot fusebox issue on relay side on Buick LeSabre

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

Problem overview

Some Buick LeSabre owners report experiencing battery drainage issues shortly after replacement, often linked to a hot fuse box on the relay side. This overheating can indicate underlying electrical problems that may drain the battery rapidly, sometimes within just 15 minutes of being fully recharged. Additionally, owners have noted that inspecting the relays for signs of damage or overheating is crucial, as faulty relays can contribute to these battery issues. Poor contact within the fuse box or with the relays may also lead to electrical faults, prompting some owners to swap relays to identify potential problems. If these basic checks do not resolve the issue, it is recommended that owners seek assistance from a professional mechanic or auto electrician for a detailed diagnosis of the electrical system.

2 people reported this problem
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Buick LeSabre vehicles with this problem

1 model year affected
Average mileage: 198,000 miles
(198,000 - 198,000)

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