Voltage Regulator?
Fleet Owner
Joined: Dec 2006
Posts: 20,637
Likes: 37
From: Lost in Pa.
Voltage regulator is part of the alternator ( on Back), you'd be better off just replacing the alternator, also if you remove and take to have tested at local auto parts store I know Advanced Auto and Auto Zone good chance others will too.
Moderator
Joined: Dec 2005
Posts: 2,815
Likes: 148
From: Billings, Montana
What I've noticed with the tests an auto parts store performs on an alternator is the tests they perform may not get it up to high enough RPM's to where it'll show it failed, so even if it passes, I'd still get a new one, as I'm also sure that's what your problem is. The light coming on is usually an indication your alternator is on it's way out, however before replacing it, make sure your connections at the battery are clean. Corroded battery terminals can also cause this.
Freshman User
Joined: Jan 2005
Posts: 25
Likes: 0
From: Perry, GA - Orlando, FL
I have an intermittent light coming on. And the voltage output difinately decreases when there is a reasonable load on the alt (e.g. lights, A/C fan, etc.). Can here the fan speed going lower. But after driving further at speed, the light will extinguish and she acts right. Advance guys dis an excellent job of testing this considering it's free! Test results show nothing obvious. I've got $175K on my truck and my insticts are telling me the alt (or Volt reg) are about to give in. Battery is new (june) btw. Any thoughts out there?
Fred
Fred
Freshman User
Joined: Jan 2005
Posts: 25
Likes: 0
From: Perry, GA - Orlando, FL
Ended up replacing the alternator. Although the 'sheet' from the repair shop listed alt replacement as the fix? On the copy of the handwritten mechanic's assessment, he listed it as a regulator failure. I took it in after I started getting voltage spikes (yes, high voltage) as opposed to the low voltage symtoms it was exhibiting. Funny, the tech said that it would pass the test sometimes...Weird.
Moderator
Joined: Dec 2005
Posts: 2,815
Likes: 148
From: Billings, Montana
Ended up replacing the alternator. Although the 'sheet' from the repair shop listed alt replacement as the fix? On the copy of the handwritten mechanic's assessment, he listed it as a regulator failure. I took it in after I started getting voltage spikes (yes, high voltage) as opposed to the low voltage symtoms it was exhibiting. Funny, the tech said that it would pass the test sometimes...Weird.
Thread
Thread Starter
Forum
Replies
Last Post
pat420swed
1967 - 1972 F-100 & Larger F-Series Trucks
9
May 15, 2017 10:05 AM
tbruz
1973 - 1979 F-100 & Larger F-Series Trucks
6
Jan 7, 2017 09:29 AM
RadioControlGuy85
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
6
Sep 3, 2016 05:59 AM
Jeff64F100CrewCab
1961 - 1966 F-100 & Larger F-Series Trucks
4
Mar 24, 2015 09:52 PM
EL84
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
5
Aug 19, 2009 06:38 PM
