Question about 2005 Ford F 350 Super Duty
Does the battery warning light prove out when key is first turned on?
Posted on Jul 28, 2017
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Posted on Jan 02, 2017
SOURCE: battery light on.
some ford vehicles have an external voltage regulator. when theres more demand for power it gives it. but when theres too much itll lower it so it does not overcharge. at 1600 rpms there is more demand, plugs firing with more fuel in the cyl, if the alt is working properly the regulator could mess up and stop power from the alt. its a cheap fix or tryout...another big problem is ground if the system does not have an adequate ground nothin would work as it should.
Posted on May 11, 2009
check fuse and fuse links.you alternator is not receiving power .you have a open fuse or fuse link.alternator need battery power in order to charge battery.
Posted on Jun 12, 2009
SOURCE: My 7.3 L diesel ford
You must have an older vehicle,but I am pretty sure the 7.3 was put out after the voltage regulator was put in the alternator.What you are describing is a voltage regulator on the the firewall.If this is so,replace the voltage regulator on the firewall,with a new one.This will be the problem most likely.The voltage regulator on the firewall should be kind of flat,almost square,and a wide plug,goes all the way across the voltage regulator.If You don`t have external regulator,then it is built in the alternator,and the alternator you purchased is bad.Be sure the wires on the back of the alternator are not broken anywhere.The big post ,largest wire,on the back of the alternator is the out put wire.It should go to the battery.If it does not have 13.65 to 14.25 volts on the back of the alternator,and at the battery positive post.Like I said,I believe the voltage regulator is on the firewall,if it looks like I described,then it is a regulator,replace this part(voltage regulator)and it will solve your problem.I hope this was some help,please let us know,thank you.
Posted on Oct 16, 2009
yes , repair the alternator
Posted on Jul 30, 2010
Testimonial: "Thank you I am having it replaced along with the Serpentine belt which has 220K miles orig."
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