: Flickering lights!! Battery &/or alternator?

01-01-07, 11:15 PM
I notice that my lights flicker and voltage spikes down a bit while I'm stopped and sometimes while driving. I had to change the battery while on a trip to florida but it was doing it before that too. I got the battery at Wal-mart (probably not a good idea). There is always some of that ashy stuff around the terminals too. Is it a new battery i need or an alternator? Help!!

01-02-07, 01:00 AM
I would start by cleaning the corrosion off the terminals. That would cause the symptoms that you are explaining.

01-02-07, 01:22 AM
if you have any kind of digital voltmeter, check what voltage coming out of alternator, but just like boombotz said earlier. clean up your terminals first
good luck

01-02-07, 02:38 PM
If you belong to AAA they'll come out & check the battery, put it on a meter & give you a print out of the test for free. Don't get me wrong, if it's bad they'll try to sell you one of theirs for about $120.00 installed.