Help Battery light stay on *batt ok alternator changed*

hi Tacoworld ** sorry for my english im french i try hard **

i got a 2011 tacoma trd dbl cab 4.0L 4x4 6ft box

2 week ago i clean little the engine with water yeah i know !.....


i let him run about 10 min to dry
the next day i dont use truck

the 3rd day i start the truck

the battery light and rsca light was on

i check my voltage and it played around 12v et 17.xx Volt

at this point i know it was the Regulator or something

i work about 10 minute of my house so i drive the truck and the same day i check 4-5 time

and the Alternator now Stable at 13.8 Any load but the battery light stay on

some say i burn a diode i keep it run about 2 week the light never get off
now i try to change alternator

the new alternator give 14.20V so a bit higher than the old one but the light stay on

i check all the fuse one the main fuse box and the little one on dash

check Ground ,neg , alternator wire nothing.... the OBD volt is the same about 14V

so now im out of idea do i miss a fuse between alernator and ecu??

 

Have you looked at your battery? That would be the first place I would look for problems. Batteries can fail in many ways: shorted cells, sulfation, loss of electrolyte, etc. I have seen some pretty crazy problems caused by batteries. You could just have a bad cable connection. Check that first, then take the battery out and have a competent technician test it before you waste too much time chasing ghosts.

 

hi , thank badger i try a a new battery and nothing change


execpt the main fuse box and the under dash fusebox
do they have another fuse or fuselink between somewhere?

 

Did you check the Alt-S fuse?
This regulates the charge Voltage.

Also be sure to check all connections on the alternator.

 

hi everyone 2 week past nothing .. i recheck every fuse with my voltmeter
execpt this morning i find my DRL dont work anymore *it canadian truck w/ OEM drl*
it integrated on the Flasher relay and everything work

i read on internet it maybe the truck shut off the drl because off the battery warning

or maybe de drl module malfontion and it cause the batt light on?

 

Wild Ass Guess. Check the grounds. I have gotten some strange stuff happen because of bad grounds. Start with the thick black wire from your battery to the body. Clean (with a wire brush) the terminal at the battery and the connection to the body.

Bon chance.

 

If you still have the old alternator I would take it to get it tested, autoparts stores here will do that for free. If not I would see if you can take the truck and get the charging system checked, also something done free here at autoparts stores.

 

Your new battery may have a bad cell in it.
I have had this happen before...
Try another battery.