1987 ford taurus battery light stays on replaced alternator and battery. found a box on right side of car with four wires on it they are alt. batt.. w/s and mod any idea what this box is and could it make my car not charge

Batt probly not chargn cause main wire in back of alt is wornout. Alternator tho sounds bad..it will drain a battery quik.Disconnect batt ovenite to confirm

electrical issues since replacing alternator & battery - Mazda 6 ...

forum.mazda6club.com > Mazda6 (Atenza) > Newbie Section

Dec 24, 2010 - Exclamation Battery Light after Replacing with New Alternator ... TheBattery Light stays on after I start the vehicle. It comes up after ~2-3 secs of ...

Battery light flashing, air bag light on, after alternator pulley ...

https://forums.tdiclub.com/showthread.php?t=343786

Feb 11, 2012 - Battery light flashing, air bag light on, after alternator pulley changeTDI 101. ... Almost a week later I am driving home and the battery light flashes on, then off, .... Seat belt light stays on, no air bag light. cjharris02892, TDI 101 ...

Battery Light Due to Damaged Alternator Wire Harness ...

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Battery Light Due to Damaged Alternator Connector on Ford Crown Victoria ... how can i turn off the airbag light on a 1991 crown victoria made by ford ... the battery light onreplace alt and batt light still what else can it be? thaqk. it sat for two weeks when we had snow i used my truck staqrted car light comes on and stays on.

Airbag light = bad battery - Maintenance, Recalls and T

Did you have the charging system diagnosed or did you just guess at it being the alternator . The charging system is computer controlled . The starter isn't working because low power , battery dead . Is there B+ voltage at the wire on the back of the alternator .B+ voltage at pin 3 at the connector pluged into the alternator .
Charge the battery use a volt meter an test for B+ voltage at the places i mention . No check engine light ? DTC'S - diagnostic trouble codes stored .
Ford Smart Charge System Alternator Not Charging
Ford PCM controlled alternator testing

Battery light on ! alternator isn't charging . Test the alternator electrical circuits .Main cable on the back of the alt. should have B+ voltage .Pin # 3 at the connector on the alt. should have B + voltage - fuse F10 10amp under hood fuse box supply's B+ to pin #3 . Pin's 1 & 2 at the connector go to the PCM - engine computer . This is a computer controlled charging system .
Ford PCM controlled alternator testing

1. Check the negative terminal where it is grounded on the chassi (frame) or block. Clean and secure connection. Also, look for an additional ground that my be connected from the hood to the rear fire wall. These are usually found on the passenger side; if none are found, get some wire and run it from the hood to the rear fire wall, or side fire wall on either side of the engine compartment.
2. If the car can be jump started: the alternator tests good, the battery tests good - start looking for blown fuses - replace any that are bad. Also, replace the starter relay as it may be shorting out and be bad. This can be found under the hood in the fuse/relay box usually placed near the battery (just behind battery).
3. I also suggest having a technician perform a diagnostics test done before any other parts are replaced (except ground from hood to firewall). This will help diagnose a more accurate issue as why this is happening, and will save you time and money from replacing random parts. Have them test the ECM {electic control module) or "brain/computer".
Please let me know if you need further assitance.
carsandcomps

1) check 10A fuse in the batt. juction box (eng. comp.) hot at all times.
2) check the large red battery wire to the alt. for good conn.
3) make sure the alt. is grounded properly
4) gray wire sent from the alt. to the PCM
5) blue wire sent from the PCM to the regulator (alt.)
6) small red wire power frorm the 10A fuse
if all checks out and still not charge replace the alt.

is the battery charged, check the ground wire going to alt, or batt or even frame....

Follow the batt + wire to a large fuse. there are two one for the starter one for the alternator they blow the fuse when the alternatror goes and this will cause the alternator not to charge.

i had a very simalar problem before like that it turned out to be a fusable link

If you had a dead short when connecting the neg. battery cable, the battery was being installed backwards or you had grounded the alternator + lead somhow.

I suspect whnen you installed the battery, you have burnt all of the diodes out in the alternator and the AMP meter is showing no charge. The AMP meter also could have taken a beating in the reversal.

Check the battery in in correctly first. If not reinstall or get the correct battery. Then check the battery voltage with the engine running. If less then 13.2. Replace the alternator again.

Good Luck