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When I see 12.9 from people, it tells me they are checking battery with a surface charge on it from the charger. Alway take your battery reading after turning on light for a minute and then everything off. Then check.
(A maintenance charger puts out about 13.5 or so to charge. It leaves a surface charge until that is pulled off with a load or letting battery normalize a few hours)
I am reading a lot of confusing about is starter running or not.
Your 12.5 probably is your actual battery condition. A little low for a new battery if it's been given a good 24 hours on a maintenance charger.
You either still have a battery issue, cable issues, or a starter issues.
I would address problem in that order.
Ballpark battery is 12.7. A 12.3 is just about discharged. Once you actually get it cranking, it should not drop below 9.7 on a stock motor.
Last edited by Jackie Paper; May 19, 2024 at 10:30 AM.
I used my battery chargers Jump feature to try to start it, this sends 50 amps to the battery. No difference when I tried this.
Well than probably not battery. Check ground as said, but I have never had a bad one, but many have. Any value in putting meter on metal and + on battery and seeing what it reads, compared to across battery? This may not work, since it only needs a little bit a connection for meter. But free to do.
How many miles on starter?
In my experience, starter clutches kick back when bad. I have never done it, but some people talk about pushing solenoid in. Ya starters are expensive!!
No idea what the issue is since I observe a strict order of operations during diagnostics. A couple of points, however. Be careful applying outside power, it's easy to hurt computers. If the battery is good, the cables aren't showing an appreciable resistance and are clean at both ends and directly jumping the starter solenoid has the same effect as pressing the start button, the starter is likely bad.
Assuming you cleaned / replaced the copper contacts in the solenoid and plunger and that the starter was correctly reassebled, the repeated clicking would indicate a lack of incoming power.
When I see 12.9 from people, it tells me they are checking battery with a surface charge on it from the charger. Alway take your battery reading after turning on light for a minute and then everything off. Then check.
(A maintenance charger puts out about 13.5 or so to charge. It leaves a surface charge until that is pulled off with a load or letting battery normalize a few hours)
I am reading a lot of confusing about is starter running or not.
Your 12.5 probably is your actual battery condition. A little low for a new battery if it's been given a good 24 hours on a maintenance charger.
You either still have a battery issue, cable issues, or a starter issues.
I would address problem in that order.
Ballpark battery is 12.7. A 12.3 is just about discharged. Once you actually get it cranking, it should not drop below 9.7 on a stock motor.
AGMs that are brand new will read that.. Even right out of the box.. Obviously with the lights on it will be lower..
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