I'm getting a battery drain and a
slight humming when I shut car
off but can't pinpoint it but it stops
when I pull the efi main fuse so
how can I fix this problem
Sounds like a stuck fuel relay, so,strikes you can find the culprit by lightly tapping on the relays one at a time or just replace them. Most parts stores will stock these.
It would be handy if you could locate what exactly is humming.
Suggestion....find your largest Screwdriver. Plug the HANDLE end into your ear and use it as a stethoscope. Let her hummmmm.....and start touching various ares of the vehicle with the blade end of this "scope"....You should have relays under hood....under dash....left and right side kick panels...and maybe behind glove box. Get back with results.
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