Alernator problem?
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
I've seen anywhere from 13.1 in the summer with the fans running full blast and stopped in heavy freeway traffic. Normal is more like 13.7 to 14.3 while driving. It you are running that low all the time, check your battery cable connections and the battery cable to the starter. Make sure all are clean and tight.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
You need to compare the voltage at the alternator to what you're getting across your battery. Use those 2 numbers to determine how much voltage loss you have in your wiring and connections in between the two.
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
I've found the nut on the alternator power output wire to be an area of interest. Somtimes the nut comes loose. If you can find a small lock washer, that will usually solve that problem.
Thread Starter
Pro
Joined: May 2008
Posts: 596
Likes: 2
From: Houston Texas
I'm afraid it's an alternator since I gave it a pretty good whack while replacing plugs 2 weeks ago-the plug turned loose and the end of the retchet hit the voltage regulator 9no visible damage thought).
