Question about 1994 Buick Roadmaster

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Interior lights blinking on/off and door locks/unlocks

When I'm driving immediately the lights are blinking on and off, the door locks and unlocks and while that is going on I hear cracking sounds?

Is this potential for an electrical malfunction that will eventually shut it down or can it cause a fire?

Mechanics charge too much to trouble shoot an electrical problem...

Any troubleshooting tips will be appreciated!

Thanks!

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