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Jim, I've always been told if one battery goes out on the PSD, you are supposed to change both. Why that is I'm not sure, maybe that has something to do with it!
For the batteries to work at their best, they need to be matched.....at least close. They need to accept a charge equally and to give up a charge equally. As an example....... If not, the better battery can be overcharged while the system is still trying to charge the not so great battery and the not so great battery never gets fully charged.
Kinda like a cell going bad in a battery....it messes up the other cells and the battery as a whole.
It is a battery "equalization" effect. One battery does equalize to the other. With the batteries on warranty, Ford won't change both, just the one that tests bad. What the local shop does though is take them in and run each of them through some type of load / charge test. Takes over an hour to get done. Then they let me know if the good battery is in the same range or if I should pay to get it changed. So far, the two times this has happened, the remaining battery was in the "it shouldn't make a difference" range. I don't know what will happen when one battery is 4 years old and the other is 3 years old...........if we ever get to that point.
I'm not sure batteries are the problem this time, as both of them were tested just 3 weeks ago, and passed as "new" and the one was changed just a couple of months ago, but with the tools and test equipment I have here, combined with the deteriorating grey vegetable material between my ears that's all I can think of at the moment.
Alternator, engine on no load, 13.9 to 14.1 Volts depending on RPM. Headlights, A/C on high with high fan, GPS, Stereo and anything else electrical I can think of is 13.2 to 13.5 Volts as read through the OBD port.
By the end of the day.....I'll be eating Percocet like M&M's..........
Well, you old fart, take it easy, then!!
Originally Posted by Seabiscuit-P3
It is a battery "equalization" effect. One battery does equalize to the other. With the batteries on warranty, Ford won't change both, just the one that tests bad. What the local shop does though is take them in and run each of them through some type of load / charge test. Takes over an hour to get done. Then they let me know if the good battery is in the same range or if I should pay to get it changed. So far, the two times this has happened, the remaining battery was in the "it shouldn't make a difference" range. I don't know what will happen when one battery is 4 years old and the other is 3 years old...........if we ever get to that point.
I'm not sure batteries are the problem this time, as both of them were tested just 3 weeks ago, and passed as "new" and the one was changed just a couple of months ago, but with the tools and test equipment I have here, combined with the deteriorating grey vegetable material between my ears that's all I can think of at the moment.
Alternator, engine on no load, 13.9 to 14.1 Volts depending on RPM. Headlights, A/C on high with high fan, GPS, Stereo and anything else electrical I can think of is 13.2 to 13.5 Volts as read through the OBD port.
Jim, I was told by both the dealer, and the shop I take the truck to, that if one battery goes bad, that both need to be changed. I'll have to ask Chris at the shop why this is, and I'll let you know.
Good evening Oregon and everyone everywhere else. Just a quick flyby. Been goofing off too much today and gotten behind. Spent to much time BS'n at the museum when I picked up some guns and then Mom decided at the very last second that we had to go to a real to life Monastery for a funeral / memorial service and I was driving.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.