2G No battery light/low voltage

Matthew Lipford · Jul 20, 2016

So my car died the other day and I found some loose wires to the pigtail 4 pin harness that plugs into the alternator. I have checked the 100 amp fuse many times and have battery voltage across it. If my battery light is not coming on at all can this still be a bad alternator? I have fixed all the wires on the pigtail and the output voltage running is from 2-10 volts on the alternator. So for some reason, maybe voltage regulator or ecu? Will a bad alternator cause the battery light to stay off ? Thanks

miguelmcv · Jul 21, 2016

Then check for fuse #8 at the cabin it might be bad, if fuse is good you need to check continuity from bulb outlet (Blue wire) to the alternator relay (Black/Yellow wire) then from alternator relay (black/yellow wire) to alternator (black/yellow wire).

Matthew Lipford · Jul 22, 2016

I will check that later today, thanks again for all the help.

Matthew Lipford · Jul 22, 2016

Anyone know a way to test the generator relay?

Matthew Lipford · Jul 22, 2016

All the fuses in the cabin are good.

Matthew Lipford · Jul 22, 2016

Where do I find the blue wire for the bulb ? I checked and have contenuity to the alternator from relay ? Thanks

Matthew Lipford · Jul 22, 2016

Ok I see 3 blue wires now ...

Matthew Lipford · Jul 22, 2016

There are two blue wires that have connection with the blue wire at the relay but nothing on the black at the relay with the same blue

Matthew Lipford · Jul 22, 2016

There is actually 4 blue wires behind the cluster

Matthew Lipford · Jul 22, 2016

3 wires on the connection all the way to the left which 2 have connection with the blue wire at the alt relay. And one blue wire on the middle connection.

miguelmcv · Jul 22, 2016

Check continuity from the bulb (cluster) to the end terminal where hoocks up the connector so you know which line is it, once you find it then check continuity to the relay.

miguelmcv · Jul 22, 2016

Sorry I don't have my manual with me to tell you exactly which wire is it.

Matthew Lipford · Jul 22, 2016

I Checked all 4 bl ue and none have contenuity

miguelmcv · Jul 22, 2016

You have to find the wire, so check continuity from the bulb to the end of the terminal where meet the connector, that's the only way to make sure you have the right wire.

Matthew Lipford · Jul 22, 2016

Ok I will

Matthew Lipford · Jul 23, 2016

I have no contenuity to the blue wire. I installed a new alternator and its holding 15.2 volts. A little high but oh well. Rather be high then low. Lol, I'm still missing a lot of dash lights at key on and yes the 10 amp fuse is good. Checked with multimeter.

miguelmcv · Jul 23, 2016

You will end up burning the battery or frying something in the car with that high voltage,.

Matthew Lipford · Jul 23, 2016

Any idea why it's so high ?

Matthew Lipford · Jul 23, 2016

The voltage regulator is brand new

miguelmcv · Jul 24, 2016

Did they tested when you bought it?,, auto parts is the worst place to get an alternator,,.

Take it to test it it shouldn't be charging over 14,5.

Matthew Lipford · Jul 24, 2016

Yes it tested good but maybe I should try another one. Anyone have a harness picture of the four colors on the alternator pigtail. Some of my wires are different colors then ones I find online. Thanks.

Matthew Lipford · Jul 26, 2016

I still have no battery lamp and if I unplug my generator relay its still is charging at 15 volts. Thanks for all the help Miguel.

Matthew Lipford · Jul 26, 2016

Alt tested good... I unplugged my 4 wire plug to alternator and the alternator is still putting out 15 volts. Is this normal?

Matthew Lipford · Jul 28, 2016

I got the car charging at 14.1 to 14.4 now. I changed the wires around on the generator relay and it fixed the overcharging problem. Still missing lamp lights. There are 3 wires that have contenuity to the bulb on the cluster.

Matthew Lipford · Jul 28, 2016

That's the two wires on the harness all the way to the left of the cluster.

Jack6ngr · Apr 17, 2020

Hello friend. Did you able to solve this issue? Mine have no charging light as well.

The Top DSM Community on the Web

2G No battery light/low voltage

Matthew Lipford

miguelmcv

Matthew Lipford

Matthew Lipford

Matthew Lipford

Matthew Lipford

Attachments

Matthew Lipford

Attachments

Matthew Lipford

Matthew Lipford

Matthew Lipford

Attachments

miguelmcv

miguelmcv

Matthew Lipford

miguelmcv

Matthew Lipford

Matthew Lipford

miguelmcv

Matthew Lipford

Matthew Lipford

miguelmcv

Matthew Lipford

Matthew Lipford

Matthew Lipford

Matthew Lipford

Attachments

Matthew Lipford

Jack6ngr

Similar threads

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds