Battery light on after 3G swap. HELP!!!!!!!

[mystangruns10s]

I just did a 3G swap on my 93 Gt. everything went fine, read the volts with the multimeter. 12 when car is off 14 when its on and lights are on at idle. I took the car out for a drive and the battery light came on after a few moments. The car seems to be running well, and when on is still puttin out 14v when its at idle. i never really had an electrical problems before. Anyone know whats going on or seen this before, could i be overcharging the battery? also how cna i pull the codes to see what happened?

 

[Mustang5L5]

Poor connection of the stator plug (the small white plug)

Make sure you have a good connection there. If it's loose, the batt light comes on

 

[RYC CUKR]

Well that answers a question I have had for quite a while. My 88 does that. The previous owner swapped the alt. Thanks for the info 5L5.

 

[mystangruns10s]

is it at the actual plug itself where it goes into the alt or is the bad connection bad where i soldiered the wire from the 3G alt to the white wire in the wiring harness? If it is a bad connection at the alt how can you tell if the alt itself is bad or the spaid connector?

 

[Aryan15]

You can check voltage at the s terminal(with car running) and you can check your connection by checking voltage with sharp probe before and after connection(car running) and using an ohmmeter(not running). Also make sure the I terminal wire(green/red) is not shorted to ground. Use ohmmeter with car off.