battery light on and off - Toyota Yaris Forums

Bluevitz-rs · 03-21-2014, 10:09 AM

I'm thinking, if there's corrosion or a loose connector on the feedback wire to the alternator regulator, it might be reading the voltage as being too low and making the alternator put out maximum output.

I'd have to look at how the regulator works again in my EWD.

CTScott · 03-21-2014, 10:32 AM

Quote:

Originally Posted by Bluevitz-rs

I'm thinking, if there's corrosion or a loose connector on the feedback wire to the alternator regulator, it might be reading the voltage as being too low and making the alternator put out maximum output.

I'd have to look at how the regulator works again in my EWD.

The white wire on the alternator connector is the feedback wire to the voltage regulator. There should be battery voltage on that pin with the engine not running.

Miryai · 03-23-2014, 02:50 AM

I purchased a volt meter. It was $5 including shipping and handling, and you never know, it might be useful for one of my house mate's cars later. But once I have it, I'm gonna plug it in and run, see if I can manage to look at it when the issue is happening. But all I know, is that it's starting to occur a lot more frequently. It's happening more and staying on longer, than when it looks like everything is fine.

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03-21-2014, 10:09 AM	#1
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	I'm thinking, if there's corrosion or a loose connector on the feedback wire to the alternator regulator, it might be reading the voltage as being too low and making the alternator put out maximum output. I'd have to look at how the regulator works again in my EWD.

03-23-2014, 02:50 AM	#3
Miryai Drives: 2008 Toyota Yaris HB Join Date: Mar 2014 Location: Oklahoma Posts: 4	I purchased a volt meter. It was $5 including shipping and handling, and you never know, it might be useful for one of my house mate's cars later. But once I have it, I'm gonna plug it in and run, see if I can manage to look at it when the issue is happening. But all I know, is that it's starting to occur a lot more frequently. It's happening more and staying on longer, than when it looks like everything is fine.