Seeking Advice on Alternator or Repair - Toyota Yaris Forums

Brumman · 09-13-2019, 01:46 AM

I have exactly the same problem!
I cleaned regulator as described although very little obvious corrosion. But still battery light is on and no daytime running lights, both should receive signals from the regulator. Should I check voltages on the 4 wires from regulator (engine on/off?) or change the regulator or alternator?

However I think following 06YarisRS experience a reman alternator is the answer, around C$130. Where on eBay can you get a regulator for $35!!?

I suspected that the DRLs not functioning was also regulator caused so it's great to find that it is probably true. 2 of the 4 wires in the regulator output plug are for the battery light and the DRL. The voltage regulation is perfect across all loads, so does that mean the other 2 wires (to and from the computer are somehow working? Strange eh?

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09-13-2019, 01:46 AM	#9
Brumman Drives: yaris hatchback 2007 Join Date: Aug 2016 Location: Hamilton, Canada Posts: 4	I have exactly the same problem! I cleaned regulator as described although very little obvious corrosion. But still battery light is on and no daytime running lights, both should receive signals from the regulator. Should I check voltages on the 4 wires from regulator (engine on/off?) or change the regulator or alternator? However I think following 06YarisRS experience a reman alternator is the answer, around C$130. Where on eBay can you get a regulator for $35!!? I suspected that the DRLs not functioning was also regulator caused so it's great to find that it is probably true. 2 of the 4 wires in the regulator output plug are for the battery light and the DRL. The voltage regulation is perfect across all loads, so does that mean the other 2 wires (to and from the computer are somehow working? Strange eh?