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my first guess would be corroded battery cables. Try reconnecting the battery and try putting the tester leads directly on the top of the posts (bypassing the battery cables on the truck)...then retest with the tester connected to + post and - cable (then reverse) to see if there are any variances between the three tests...
my first guess would be corroded battery cables. Try reconnecting the battery and try putting the tester leads directly on the top of the posts (bypassing the battery cables on the truck)...then retest with the tester connected to + post and - cable (then reverse) to see if there are any variances between the three tests...
Truck is parked under carport .... only 5 years old and cables look pretty clean.
My voltmeter gives the same readings whether I check battery post or the connector.
Also checking positive battery post to vehicle ground gives same reading .
I don't think I can try what you explained as the cable connector covers the entire battery post.
measuring voltage with the voltmeter doesn't force any current across the battery cable connections like the load tester does. you might wire brush the posts and the inside of the cables and try again.
measuring voltage with the voltmeter doesn't force any current across the battery cable connections like the load tester does. you might wire brush the posts and the inside of the cables and try again.
The ground from the battery goes to the body, then there is a ground strap from the body to the frame, usually looks like it's woven metal. Check those to make sure they are clean and tight. Not sure where they are exactly on our generation of truck, as I haven't had that issue, but they should be easy to find.
The ground from the battery goes to the body, then there is a ground strap from the body to the frame, usually looks like it's woven metal. Check those to make sure they are clean and tight. Not sure where they are exactly on our generation of truck, as I haven't had that issue, but they should be easy to find.
One sure fire way to reset the BMS is to just disconnect the battery for a few hours. Try to do that when you go to bed, and reconnect when you get going in the morning.
Well I've had the BMS disabled for week or so and it has started up pretty good, maybe 1 hesitation (turning on ignition not immediate)
Decided to let Ford have a look, so yesterday I hooked the BMS sensor connection back up,
Sat approx 20 hrs untouched and locked. This morning 4 tries to start.
First 3 tries ... dead ... like I did not have a battery connected. Error message comes up Charging System Service Now
THen it started on the 4th try.
I've done a lot of searcing but never come across anyone with this same problem.
