4.0L V6 Technical DiscussionsAny questions about engine, transmission, exhaust, tuners/CAI, or gearing can be asked here!
Welcome to Mustang Forums!
Welcome to Mustang Forums.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!
Hi everyone! I have had my car in the shop twice this week for the same problem. My battery gauge moves up and down and my lights (interior/dash/headlights) flicker with the moving of the gauge. I replaced my alternator less than a year ago and when I took it to Ford they told me my battery had a short in it. After replacing my battery its still doing the same thing and when I took it back in they told me it was not doing it while they had it, but I have had it back for two days and it continues to do it. Any thoughts on what it could be?
Thanks so much!
This ad is not displayed to registered or logged-in members. Register your free account today and become a member on Mustang Forums!
Location: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
Posts: 14,771
Check the condition and tightness of the battery cables and clean the connector to the alternator. If that doesn't help, then I suspect that it's the alternator (again). A battery by itself won't cause erratic voltages.
The alternators in these cars are known, weak components. If possible, find someone that sells good rebuilt units. They're not very hard to install.
thats the easiest way to check your alternator without using a volt meter.
__________________
05 White V6 4.0
GT takeoff m/t single muffler--GT shocks and coils tint--GT front end
Clear corners-C&L / X-Cal 3 From BAMA. (91 Race Tune)
Roush Hood scoop C/S Rear bumper
FOR SALE 94K Miles mechanic owned
***SOLD***
thats the easiest way to check your alternator without using a volt meter.
This was a tried and true method back before cars were stuffed with sensitive electronics and gas cost 39 cents a gallon. These days, it's not really wise and can cause voltage surges that can damage components in the car including an otherwise functional alternator.
__________________ 2005 Mustang 4.0L V6 'Vert
X-Charger Xtreme S/N 004 * 328 rwhp/ 339 rwtq
First X-Charged manual * First X-Charged 'vert * First X-Charger Xtreme manual
MF Ride of the Month: July 2011 Massachusetts Regional Chapter Forum
Last edited by Torch_Vert; 02-08-2011 at 03:30 PM.
This forum is owned and operated by Internet Brands, Inc., a Delaware
corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford
Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor
Company
Lights flickering/Battery gauge moving
