Hello!! Hoping you guys can help me track down an electrical gremlin. 2005 Tundra SR5 access cab. The charging system is not working. First indication was the AC fan quit powering on. Put a power source to the fan and it spun so i figured it was the resistor. Then last night it left me sitting on the side of the road. I was thinking the battery was bad since its an 2005 with a toyota battery still on it(I've had the truck for about 2 years). Parts store guy test it says the battery tests bad so I buy that. Runs test again, the alternator is showing failed. So I get that and bolt it on. Kinda a pain in the butt to remove just for the fact its on the bottom of the engine and you have to unbolt the power steering pump to get it off. Anyway, I take the old one back and have them bench test it, it tests good! So I have them test the new one, system still isn't charging. I'm at a loss. My only thoughts are maybe a ground is bad. I've checked the ones on the fenderwells and the firewall, all show as good ground points. Maybe a computer issue?? But I didn't think Toyota's relied on the ECU for charging like that. Any info or direction will be greatly appreciated!