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To replace the headlight dimmer switch on a 1978 Buick Regal, first disconnect the battery to ensure safety. Remove the steering column cover by taking out the screws, then locate the dimmer switch, which is typically mounted on the steering column. Disconnect the wiring harness from the old switch and remove it, then install the new switch by reversing the process. Finally, reassemble the steering column cover and reconnect the battery to test the new switch.

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5mo ago

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