Electrical gurus need help

[Blackout]

Ive been dealing with this issue for awhile now and cant seem to find out what is causing all my lights to flicker. Any help or suggestions?
TIA



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[ohiopatriot]

I would suggest to check battery cables first. Clean and tight.

If they are good I would suspect the alternator. A shop that can do a charging system test could probably verify (not sure AutoZone types can do more than check charging voltage).

Another option is to wire a bulb across the battery terminals and see if it flickers too, if it does that would eliminate electrical noise from anywhere else on the vehicle and indicate the alternator.

 

[mike d]

a lot of time a bad ground from one of the lights is not grounding properly, then system backtracks to find a alternate ground causing lights flicker and some times not operating at all

 

[Reece]

Poltergeist.

Kidding...I would check grounding.

 

[CodaMan]

Most individual lights use their own ground. If the flickering is consistent you can remove 1 bulb at a time until the flickering stops. That should tell you about where the problem is.