Radio didn't play when vehicle turned off "battery saver"
12-27-2017, 08:02 AM
#1521
Actually it does have an effect on the charging of the battery. From what I understand, the sensor is checking the state of charge for the battery. I leave my SCT plugged in on my truck 24/7 and before I unplugged my sensor, it would show a voltage of about 12.5 while running. I now have a voltage of 13.5-14.0 while running with the sensor is unplugged. With short drives, my truck would show the message continually and I could hear the truck struggling to start. Now it is charging more while driving the shorter distances and recovering the charge fully.
12-27-2017, 04:10 PM
#1522
Senior Member
Right. The sensor reads current and so the truck can calculate the state of charge of the battery. Without it, the truck must charge on voltage. There is some change in voltage by temperature but other than that, it charges at a constant voltage.
The following users liked this post:
FORDMAN (12-28-2017)
12-28-2017, 08:50 AM
#1523
Senior Member
Thanks 46L281GT and Feathermerchant. If this is true that's the first I heard it actually allows a full battery charge. And I'v been following this thread for the last four years. Guess I'll have to do some constant battery voltage testing.
12-28-2017, 06:08 PM
#1524
I've had this problem since new. Rarely during the warmer weather but often in our Phoenix winters. I haven't had the BMS updated since I've haven't had a reason to go to the dealer, a half hour away, since that update came out. When I do drive, there's always a minimum of 20 minutes on the freeway going and coming.
I did find that if I charged the battery overnight during the times when the message comes up, the truck starts faster and I won't get the message again for a week or two. Curiously, or maybe not, when I first connect the charger it reports the battery is at 75-80% charged.
I just disconnected the #10 connector and will see how it goes.
I did find that if I charged the battery overnight during the times when the message comes up, the truck starts faster and I won't get the message again for a week or two. Curiously, or maybe not, when I first connect the charger it reports the battery is at 75-80% charged.
I just disconnected the #10 connector and will see how it goes.
12-29-2017, 01:04 AM
#1525
Senior Member
The problem is the BMS limits the charge.
12-29-2017, 09:44 AM
#1526
Member
Yesterday overnight, it was crazy cold (-20 C / -4F), and I moved the truck onto the street while I cleared the snow from the driveway. After 3 hours with emergency flashers, the truck barely turned over. Once I got it started, after returning it to the driveway, I put it on a trickle charger overnight to get the battery back up to “full” charge.
Truck is 44 months old with the original battery. I am considering whether to replace the battery. As a precaution, I usually replace a car battery after 6 years, even when the vehicle does not seem to need it, so this would be much sooner than normal for me.
Does anyone know yet what impact removing the sensor has on the BMS?
Could removal of the sensor cause the alternator to overcharge the battery?
Are there any negative side-effects to sensor removal?
Truck is 44 months old with the original battery. I am considering whether to replace the battery. As a precaution, I usually replace a car battery after 6 years, even when the vehicle does not seem to need it, so this would be much sooner than normal for me.
Does anyone know yet what impact removing the sensor has on the BMS?
Could removal of the sensor cause the alternator to overcharge the battery?
Are there any negative side-effects to sensor removal?
12-29-2017, 10:29 AM
#1527
Senior Member
I've had this problem since new. Rarely during the warmer weather but often in our Phoenix winters. I haven't had the BMS updated since I've haven't had a reason to go to the dealer, a half hour away, since that update came out. When I do drive, there's always a minimum of 20 minutes on the freeway going and coming.
I did find that if I charged the battery overnight during the times when the message comes up, the truck starts faster and I won't get the message again for a week or two. Curiously, or maybe not, when I first connect the charger it reports the battery is at 75-80% charged.
I just disconnected the #10 connector and will see how it goes.
I did find that if I charged the battery overnight during the times when the message comes up, the truck starts faster and I won't get the message again for a week or two. Curiously, or maybe not, when I first connect the charger it reports the battery is at 75-80% charged.
I just disconnected the #10 connector and will see how it goes.
12-29-2017, 10:35 AM
#1528
Senior Member
Yesterday overnight, it was crazy cold (-20 C / -4F), and I moved the truck onto the street while I cleared the snow from the driveway. After 3 hours with emergency flashers, the truck barely turned over. Once I got it started, after returning it to the driveway, I put it on a trickle charger overnight to get the battery back up to “full” charge.
Truck is 44 months old with the original battery. I am considering whether to replace the battery. As a precaution, I usually replace a car battery after 6 years, even when the vehicle does not seem to need it, so this would be much sooner than normal for me.
Does anyone know yet what impact removing the sensor has on the BMS?
Could removal of the sensor cause the alternator to overcharge the battery?
Are there any negative side-effects to sensor removal?
Truck is 44 months old with the original battery. I am considering whether to replace the battery. As a precaution, I usually replace a car battery after 6 years, even when the vehicle does not seem to need it, so this would be much sooner than normal for me.
Does anyone know yet what impact removing the sensor has on the BMS?
Could removal of the sensor cause the alternator to overcharge the battery?
Are there any negative side-effects to sensor removal?
12-30-2017, 08:19 AM
#1529
Member
Rick - I would not have thought 3 hours of 4-ways would drain a healthy battery, though I may be wrong.
Azjerry - when I connect the BatteryTender trickle charger to mine, the battery is always below 80% (<80% red solid, >80% green flashing, 100% green solid).
I got out the timer and power cord for the block heater yesterday, first time ever in December I think.
Azjerry - when I connect the BatteryTender trickle charger to mine, the battery is always below 80% (<80% red solid, >80% green flashing, 100% green solid).
I got out the timer and power cord for the block heater yesterday, first time ever in December I think.