'99 Z28 - Flickering Lights
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'99 Z28 M6 w/ 193K miles
As I sat waiting for a red light this morning, I noticed that my headlights were flickering. The voltage gauge indicator fluctuated between approx 12.5v and 14+v. It seemed to "pulse", in that it was fine for 30 or 40 seconds, dropped down to the lower voltage, and then returned to normal.
The battery is brand new. The alternator has been replaced, although at probably <100K miles.
Does this sound like a voltage regulator problem, or an alternator problem? Or could it be something as simple as a loose battery cable? I'm just curious as to where to start diagnosing the problem.
If it seems like a voltage regulator issue, then my next question is "where is that located?"
Thanks in advance.
Bill
As I sat waiting for a red light this morning, I noticed that my headlights were flickering. The voltage gauge indicator fluctuated between approx 12.5v and 14+v. It seemed to "pulse", in that it was fine for 30 or 40 seconds, dropped down to the lower voltage, and then returned to normal.
The battery is brand new. The alternator has been replaced, although at probably <100K miles.
Does this sound like a voltage regulator problem, or an alternator problem? Or could it be something as simple as a loose battery cable? I'm just curious as to where to start diagnosing the problem.
If it seems like a voltage regulator issue, then my next question is "where is that located?"
Thanks in advance.
Bill
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i replaced the alternator this evening. as usual, a 30 minute job turns into 2 hours since i feel a need to clean everything around the alternator while i work.
i took a test drive this evening and everything seems to be working fine.
thanks for the help.
i took a test drive this evening and everything seems to be working fine.
thanks for the help.
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Either you were lucky or two years ago they were making better ones, or could even be the builder for Advance Auto is a better builder? Who knows, I know that quite a few people had the same problem I did until they took their alternator to a builder that used better quality parts or did the truck alternator like I did. We dont have Advance Auto's around here that I am aware of and I tried alternators from 4 different suppliers so I gave up on parts store alternators. And the junkyard truck alternator is by far the best alternator I have ever had on the car.
Last edited by 00pooterSS; 08-11-2010 at 10:26 AM.
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https://ls1tech.com/forums/generatio...-failures.html
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From a 99-03 truck/yukon/escalade, etc. 145 amp with the 4 pin connector. pooterss's thread is full of info.
https://ls1tech.com/forums/generatio...-failures.html
https://ls1tech.com/forums/generatio...-failures.html
BillsCamaro's I posted above that I got your message, when I went back and checked my email it looks like that message was from someone else so disregard that statement. As for details on the truck alternator Jay-P posted the link that has all the info in it. That alternator was the best $40 I have ever spent on my car!
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My headlights and all other lights just started flickering too, it seems to do it only during cold start ups ... or maybe that's how long I've been paying attention to it. So its a regulator problem which is a part of the alt. Does anyone know if it will just suddenly fail or will it hold for a while? I ask because I'm about to go see some friends on the other side of the state for the weekend....