Voltage goes up and down? WHY!?
Thread Starter
On The Tree
Joined: May 2011
Posts: 112
Likes: 0
From: Royal City, WA
Voltage goes up and down? WHY!? i bought a new alternator with voltage regulator, new battery and my voltage drops greatly with signal lights and a/c or cruise control. why does it do that?
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo but no one makes a NEW alt.........well........almost no one.........
https://ls1tech.com/forums/generatio...lternator.html
https://ls1tech.com/forums/generatio...lternator.html
i am having the same issue. i have replaced the alternator with a quality piece not a crappy vautozone one, replaced the battery and double checked all bolts are fastened down. dont know whats going on. it randomly goes from mid 13v's into the low 12's. cranks up in the morning at 14.2'ish
i am having the same issue. i have replaced the alternator with a quality piece not a crappy vautozone one, replaced the battery and double checked all bolts are fastened down. dont know whats going on. it randomly goes from mid 13v's into the low 12's. cranks up in the morning at 14.2'ish
If the alternator tests out good, you might have an exciter wire problem.
mine is not an autozone alt. its a purpose built alternator and is tested good. the exciter wire is actually new since i stripped it when i replaced the alternator when i was having this same issue.
Ive also been told voltage fluctuating can be caused by a high speed fan signal malfunction, which i am looking into.
Ive also been told voltage fluctuating can be caused by a high speed fan signal malfunction, which i am looking into.
mine is not an autozone alt. its a purpose built alternator and is tested good. the exciter wire is actually new since i stripped it when i replaced the alternator when i was having this same issue.
Ive also been told voltage fluctuating can be caused by a high speed fan signal malfunction, which i am looking into.
Ive also been told voltage fluctuating can be caused by a high speed fan signal malfunction, which i am looking into.
nope problem was before new alt and battery install and is still a problem with a brand new alt and battery. all connections for the 4 pin (1 wire) cable are tight and the bolt on the back of the alternator is tight. nothing else on the car has been changed before or after this started.
Last edited by cookba; Aug 13, 2011 at 05:14 PM.
What kind of aftermarket electrical accessories do you have on the car?
Have you also checked the indicators on the tensioner to make sure your serpentine belt isn't stretched out? Also, have you matched the belt routing to the sticker on the driver's side shock tower? (A loose belt can cause things like this.)
Have you also checked the indicators on the tensioner to make sure your serpentine belt isn't stretched out? Also, have you matched the belt routing to the sticker on the driver's side shock tower? (A loose belt can cause things like this.)
