Urgent Need Of Help - Charging System

[2003PSD]

I went mudding 2 weeks ago. When I was driving home, my battery light came on. It went away about half way home. For about a week, it would come on and occasionally go off. Then my batteries were dead. I charged them up, and had the system checked at the auto parts store. They determined it was my alternator. I just had my alternator rebuilt 9 months ago but bought a new one. Just installed the alternator and started the truck, but the battery light is on. I was planning on going out of town this weekend, but worried about my batteries not charging.

ANY IDEAS????

[bigred_stroker]

since you put a new altenator on, the computer might be thinking there is still something wrong. Check all of your connections on the altenator, make sure they are good. Then unhook the batteries for about 5 min. Hook them back up and it should fix the problem. Hopefully this works and helps.

[scottm0821]

i had the same problem. i changed my alternator out and still was having problems. the batteries were only 2 weeks old, and the auto parts store said they were fine just wern't charged. so took my truck to the dealer and come to find out ford motorcraft batteries were have problems and mine were bad. changed the batteries and everything is fine now, also when the auto parts store checked everything after i changed the alternator, they were trying to say the new alternator was bad, my volt gauge was only reading like 10V while idling. after changing the batteries its at 13V. so that was the problem.

[2003PSD]

I put the alternator on, connected batteries, disconnected batteries earlier thinking same thing. I had both batteries go bad 9 months ago, replaced them to find alternator was bad. Rebuilt alternator and now a new alternator but I am clueless to this fix. I hope its the batteries since they have a warranty.

[scottm0821]

yeah i didnt think to try it but you can put a meter on the back of the alternator and see what the voltage is, it should be around 13v if your alternator and batteries are good,if not then while the truck is running disconnect the batteries, and check again. i didnt think the batteries could make the alternator drag like that but it did on my truck so see if thats your problem.

[2003PSD]

Getting old alternator and new alternator tested tomorrow. If they are both bad, again an alternator. If good, I am assuming wires. Has anyone redone wires? I will have tomorrow morning or I am canceling the trip. Any advise would help

[MINIs1094]

do you have a 7.3 or a 6.0 i can email you some wiring diagrams if you need them

[FlagMissed]

I had the same problem with my 2000. I got a high output alternator (the kind they put on ambulances) cleaned the connections agian and haven't had the problem since. That was about 1 1/2 years ago.

[2003PSD]

Originally Posted by MINIs1094

do you have a 7.3 or a 6.0 i can email you some wiring diagrams if you need them

I have a 6.0 Anything will help. I have never done wires before. I am assuming it is just wires between alternator and batteries. I would rather have luck of both alternators bad than doing wiring.

[2003PSD]

Originally Posted by FlagMissed

I had the same problem with my 2000. I got a high output alternator (the kind they put on ambulances) cleaned the connections agian and haven't had the problem since. That was about 1 1/2 years ago.

Which connections & with what? on the alternator? I just bought a 200 amp high output alternator, but batteries still aren't taking a charge. At this point, I just want my truck to run and charge