Battery light

Alternator? YES, It very well "could" be.

There is no clearing of the red battery light.
It is giving you a warning something is wrong with the system. Usually insufficient charging

This guide can help us

https://www.2carpros.com/articles/how-to-check-a-car-alternator

If you have a Advance Auto Parts near you they will check the alternator free of charge.
Good Luck;
Rick

Hello,

It sounds like your battery is going bad here is a guide to help check it.

https://www.2carpros.com/articles/car-battery-load-test

Please run down this guide and report back.

Have the charging system checked out could be the alternator on its way out

Hi there, I would first have the alternator charge rate checked, this light is indication low battery charge rate.

Mark (mhpautos)

"S" & "I" CIRCUIT TEST
Unplug regulator 3-wire harness connector. Connect jumper wire from harness "A" terminal to regulator "A" terminal. See Fig. 1 and Fig. 2 . Connect another jumper wire from regulator "F" terminal screw to generator housing.
With engine idling, connect voltmeter negative lead to battery ground terminal. Connect voltmeter positive lead first to "S" terminal and then to "I" terminal of regulator harness connector. See Fig. 2 . Voltage at "S" terminal should be about 7 volts and about 14 volts at "I" terminal. If "S" terminal and "I" voltages are okay, replace voltage regulator. Repeat LOAD TEST. If "S" and "I" circuit voltages are not as specified, go to next step.
If voltage is present at "S" terminal, but not 6-8 volts, replace generator. If no voltage is present at "S" terminal, disconnect one-wire connector ("S" terminal) on back of generator. Check voltage at single "S" terminal. If about 7 volts are present, repair "S" circuit wiring. If no voltage is present at single "S" terminal, replace generator.
If no voltage is present at "I" terminal, repair indicator light wiring circuit. Restore wiring connections and repeat LOAD TEST.
Fig. 2: Identifying Regulator Harness Connector Terminals

Hi Jeff;
There is a very "high" possibility you have a problem with your alternator. Your ride home was solely dependent on the battery. Running lights, radio, etc. Completely depleted the energy out of your battery.

Your alternator should have been supplying the needed power to the components instead of your battery.

If you have a Advance Auto Parts near you, the will check your alternator and battery free of charge.

I hope this information helped;
Rick

First off, with the battery light, I think you did everything correct. It sounds like the altenator you installed is not turning off the battery light. According to the diagram, power is supplied to the charge light from the hot bus thru the ignition switch. It gets its ground thru the Altenator. When the altenator produces power, the internal logic removes the ground for the charge light indicating the system is charging normally. I would have the altenator and battery tested at your local parts store, and if they check normal, replace the altenaor with your warrenty.
On a side note, I woudl check all of the connections including the grounds for your battery, and engine ground for corrosion and tightness. Some times when things are not grounded properly, weird symptoms do occur.
Looks like the filter should be located near the tank on the side of the aft support beam.

We need to test a few things.

1) Turn the ignition off.
2) Disconnect alt connector
3) With the engine running, check voltage between harness ( I ) and ground. See picture:

Is the voltage between 8 and 10 volts? If yes, the alt is bad. If no, do the following:

1) Turn the ignition off.
2) Disconnect PCM connector A
3) Measure the resistance between alt connector I and the harness side of the PCM connector A terminal 8.

Is the resistance less than 5 ohms? If no, repair the light green / red wire. If yes, do the following:

1) Measure the resistance between alt connector, I, harness side and ground. Is the resistance greater than 10,000 ohms? If yes, replace the PCM. If no, repair the circuit.

Let me know if this helps.
Joe

Check fuse no.15 7.5amp and alternator system fuse 30amp. and double check all connections-also see below