I've suspected I have electrical issue somewhere for a while. My voltage gauge/needle has not been as high as I recall. I purchased a new interstate battery in October 2015 and the truck did not see much action until October 2017 where I've used it seasonally. If it sits a month, I have to put a charger on it for several hours to get a crank. Once it's starts up, everything works, which makes me think I have a battery issue vs. alternator, but I'm not certain. I read a half dozen posts on the topic this morning, and did some testing:
Cold battery after having been on the charger for 12 hours 12.04 V
80 barely starts
Low idle, the red volt light comes on, and the Volts climb to 13V at the battery
High idle (1600) or so, volts climb to 14.1V at the battery
Turn on AC at 1600, volts fall to 13.2V at the battery
Rev up to 2500, volts climb to 14.2V at the battery
Turn her off, volts fall to 11.9V at the battery
Does this sound like a solid battery problem vs alternator/link/etc?
Called Oreilly's and they have the Optima Red (https://www.oreillyauto.com/detail/...attery/red35/4573820/1997/toyota/land-cruiser) on hand. If it's the battery, does it make sense to spend up for the Optima AGM vs. another Interstate 27F at Costco for $90?
I do not know where to test the alternator apart from the battery terminals.
Thanks.
Cold battery after having been on the charger for 12 hours 12.04 V
80 barely starts
Low idle, the red volt light comes on, and the Volts climb to 13V at the battery
High idle (1600) or so, volts climb to 14.1V at the battery
Turn on AC at 1600, volts fall to 13.2V at the battery
Rev up to 2500, volts climb to 14.2V at the battery
Turn her off, volts fall to 11.9V at the battery
Does this sound like a solid battery problem vs alternator/link/etc?
Called Oreilly's and they have the Optima Red (https://www.oreillyauto.com/detail/...attery/red35/4573820/1997/toyota/land-cruiser) on hand. If it's the battery, does it make sense to spend up for the Optima AGM vs. another Interstate 27F at Costco for $90?
I do not know where to test the alternator apart from the battery terminals.
Thanks.