I just noticed this morning that when I put on my right turn signal the volt gauge shows it's dropping from about 14v to 12v then back when the lights are lit. I recently put in a new battery, HO alternator, did the big 3, stereo system and amps, etc. I don't know if it did this before and I just didn't notice it or not. The volt gauge moves very slightly when the left turn signal is on and a lot with the right. I put in a new flasher and it made no difference. Doesn't matter if headlights are on or off, brakes, stereo, etc. I checked all the wiring I could see when putting the flasher in and everything looks good. Is it possibly shorting out or ? Hasn't blown a fuse. Trying to see if it's something I should worry about or not. Thanks.

 

Check your battery connections. If they aren't good and snug, that canl happen. For what ever the reason's the batterys are a strange bunch and like to be good and tight even if you think they are. Give it a go again.

I have had my blazer stop dead in the road after putting in a new battery, pull off the road, hit the key and it would start right up, did this until I got home (50 miles) I checked everything, recheck the battery as a last stand, retighten the screws that goes into the side (they appeared to be okay, but did it any way) and the problem was fix. Another time after installing a new Altnator (sp) I kept hearing that same sound thru the radio that it makes when the Alt is going bad, went and pick up a new Alt, thought everything was fine for about a week, then the noise started again, took the Alt back to Auto Zone for a check and it check out fine, but requested a new one anyhow (life time warrantly) put it in and I'll be damn it did it again...Went back to the battery connections and retighten them again and the problem solve. The old Alt was really good the whole time..Again recheck your battery connections...

 

Rechecked the battery and the connections are good and tight. I pulled out the rear taillight and checked the bulbs and harnesses and they're good. The volt gauge still kicks way down and the interior lights dim with the right turn signal on- even when there are no bulbs in the taillight. Couldn't see any issues with wiring or anything.