Dual Batteries Question
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Junior User
Joined: Nov 2008
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From: Northeast PA
Dual Batteries Question
I have a 2020 F250 6.2 with dual batteries. I am assuming that they are in series? Also if I disconnect one battery the other battery should keep the memory in the truck? I am connecting some lights to the battery and while I am under the hood and working with the batteries I want to fully disconnect them (one at a time) and apply dielectric grease to the posts. Thanks!
Fleet Mechanic
Joined: Jul 2019
Posts: 1,651
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The dual batteries are connected in parallel. If you disconnect one the other will still be connected and supplying power to the truck.
Be careful not to allow the positive terminal to come in contact with ground. Even with the ground cable removed from the one battery the other battery is still connected to ground.
BTW, if the batteries were connected in series the output would be 24v instead of 12.
Be careful not to allow the positive terminal to come in contact with ground. Even with the ground cable removed from the one battery the other battery is still connected to ground.
BTW, if the batteries were connected in series the output would be 24v instead of 12.
Fleet Mechanic
Joined: Jul 2018
Posts: 1,620
Likes: 570
From: Black Hills of SD
Safest way, disconnect negative first on the battery you want to work on...... When complete, connect negative last.... Also, not a bad idea to wrap your positive clamp in electrical tape while you do your work....
Laughing Gas
Joined: Nov 2019
Posts: 852
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From: Florida
It affects the charging capability on the batteries?
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Laughing Gas
Joined: Dec 2019
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From: MA
Dielectric is an insulator.
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Laughing Gas
Joined: Aug 2018
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I thought using Dielectric grease was a good idea on connections
. I used some on my Anderson plugs going from my truck to a DC to DC battery charger and it worked fine.
I may have gotten luckily since I didn't use to too much and the pressure the connections put on each other.
Always learn something on this forum.
. I used some on my Anderson plugs going from my truck to a DC to DC battery charger and it worked fine. I may have gotten luckily since I didn't use to too much and the pressure the connections put on each other.
Always learn something on this forum.
Laughing Gas
Joined: Dec 2019
Posts: 863
Likes: 35
From: MA
I thought using Dielectric grease was a good idea on connections. I used some on my Anderson plugs going from my truck to a DC to DC battery charger and it worked fine.
I may have gotten luckily since I didn't use to too much and the pressure the connections put on each other.
Always learn something on this forum.
. I used some on my Anderson plugs going from my truck to a DC to DC battery charger and it worked fine.I may have gotten luckily since I didn't use to too much and the pressure the connections put on each other.
Always learn something on this forum.
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