way2roll
Wilmington NC
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Had this happen on my brand new F350. Dealership said the batteries were fine but when I isolated them individually, one was actually bad. You can't get a good test unless they are isolated. And if there isn't enough amps the ECM will not allow it to start. In my case the brand new batteries were leaking and it was a known defect. But your batts are old enough to probably just be worn out.
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Cummins12V98
on the road
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I guarantee it's the batteries!!! It's always the batteries on the newer RAM's. Be happy you made it that many years.
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larry barnhart
wenatchee. wa usa
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In the old days if the head lights came on and went out as you tried to start the engine it was the battery. cleaning the terminal's sometimes fixed the problem or new battery was the fix. because of my wife's heart issues new batteries were purchased in the later years.
chevman
chevman
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M.R.E.
MI, usa
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Tried jumping to start, still just one click. I think it must be a fuse.
Power to every thing else.
toolmaker
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Grit dog
Black Diamond, WA
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Ok…but
And presuming you put enough juice to it to start….
If it’s the solenoid clicking then the starter solenoid fuse is good.
Pretty sure there isn’t a fuse on the starter + cable.
But you could always actually check the batteries health….still likely batteries.
These engines will start (in warm weather at least) with one good battery, fwiw. But not if one is trying to kill the other.
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Krusty
Calgary, Alberta,Canada
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Connect a volt meter to one of the batteries. What does it read? Now watch it while trying to crank the engine over. What does it read now?
Krusty
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opnspaces
San Diego Ca
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In days of old a single click was a sign of a bad starter solenoid and a multiple click was a sign of a bad battery.
I agree with putting a meter on the battery and see what it reads when somebody else tries to start it. Being a diesel do the test twice once for each battery.
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Horsedoc
Dixie --- N. Georgia
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Betting battery. I have a '17 very few miles and used very little. Same thing. Showed power but would not turn over. took it to the dealer and they put one in. Parts store would have done it for half that, but I didn't know it was battery.
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Grit dog
Black Diamond, WA
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Krusty wrote:Connect a volt meter to one of the batteries. What does it read? Now watch it while trying to crank the engine over. What does it read now?
Even easier just pull up the voltage reading on the dash display. . Even without cranking the starter or grid heater it was reading 10 and 11 v.
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Cummins12V98
on the road
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M.R.E. wrote:Tried jumping to start, still just one click. I think it must be a fuse.
Power to every thing else.
Load test both separately and report back.
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