Quote:
Originally Posted by blackoutt
If I'm remembering correctly - High 14.x's cold start, low 14.x's on both batteries when connected warm and cruising highway speed. I have a dual voltmeter installed in my center console to monitor but you could also use things like scanguage or a cheap cig lighter plug in, or OBD scan tool - bluetooth/wifi dongle with torque lite app.
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Thanks for the reply!
I installed an AGM battery and the GM diode and was seeing 15 volts occasionally (via scan gauge), which seemed awful high. I went back to the regular 7.5 amp fuse, and I'm seeing 13.8-14.0. Does anyone have any documentation on the charge profile that AGM's require? I've heard they require more, especially optimas. My 4runner isn't a daily driver, so I'll have to double check my numbers again. Most of the online charts I'm seeing show that more than 14 is required at 77 degrees, maybe I will have to swap that diode back in. Is anyone seeing and negatives to a standing voltage of that high?