Why does my F350 PSD have two batteries?
This might seem like a dumb questions, but why does my 2001 F350 7.3L PSD have two batteries? I have two other F250, a 5.4L and 6.8L gassers, which both have 1 battery. Normally I drive the F350, but went on vacation for 3 weeks and of coarse the battery dies. When I went to jump it I notice two batteries. Do I charge both or just one? Is that normal for a diesel? or was the second one a add on?
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Just about all diesel pickups get two batteries. The main reasons are 1) it takes a lot of starter motor power to crank them, and 2) glow plugs pull a lot of current.
If you have a bad battery you should replace BOTH batteries together. I guess you don't open your hood too often, LOL. |
I thought it was so they could fill that empty space on the drivers side.
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Thanks Bill, I don't open the hood much, as I routinely maintain my trucks at least every 3 months through my mechanic. I am somewhat handy mechanically, but if it's something new that I never worked on it will take me forever to fix. Also I'm a perfectionist on my own stuff. Free time with family these days is more important. The diesel was bought a few months ago and really didn't take a close look.
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you try to turn over 16:1 compression ratio and then you will know. plus the glow plugs and stuff, peak demand is why.
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and yes to your other Q they are connected so charging one will charge the other
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Thanks Guys, giving the F350 a good charge now and if it doesn't work, new batteries.
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Originally Posted by Tim98TA
(Post 8243627)
I thought it was so they could fill that empty space on the drivers side.
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Ok, since you are in the market for new batteries, I suggest you to buy a higher CCA than stock. I use 875 CCA yellow top ones from Autozone. Optimas are little pricey but are very good...just a thought.
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Originally Posted by Vijay
(Post 8244410)
Ok, since you are in the market for new batteries, I suggest you to buy a higher CCA than stock. I use 875 CCA yellow top ones from Autozone. Optimas are little pricey but are very good...just a thought.
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I priced both Optima's and Yellow top ones from Autozone. It just made sense to buy Autozone brand at that time...
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I'm also running the yellow tops from Autozone. The original Motorcraft batteries lasted 4 years before giving up the ghost. I threw on some Energizers after that, and they died in no time.
I've had the Autozone batteries for a few months now and they seem to hold a charge really well. Had some injector o-ring problems recently that I haven't fixed yet, so my truck has been sitting in the driveway for some time now. I had to use my truck last night, and the batteries were strong as ever. If they last as long as the Motorcraft ones, I'll be happy. |
Fully charged, so hopefully stay charged. CA doesn't get too cold, but this last 2 weeks been cold. I'll keep the Autozone battery in mind.
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Originally Posted by America
(Post 8243553)
This might seem like a dumb questions, but why does my 2001 F350 7.3L PSD have two batteries?
Glow plugs also draw some current (100 Amp??) but it is not significant compared to the starter motor. If anything, the activity to operate the glow plugs helps to warm the battery a bit before starting, making the batteries more potent then if you did a fresh cold start crank. |
Originally Posted by QwkTrip
(Post 8245481)
Glow plugs also draw some current (100 Amp??) but it is not significant compared to the starter motor.
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