What is the function of the Delphi electronic unit inside the air cleaner box of a 2002 Buick Regal?

Use a pencil eraser to clean off the contacts and remove the corossion. You can also use CRC electronic cleaner to clean out all the acid residue.

inside the vacuum head

Because we have electronic components mounted inside the computer

Use an electronic cleaner & spray inside the outlet to clean it. Make sure there is no power at the outlet when you're doing this. If it is extremely rusty you may have to replace the outlet.

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