I do have a volt meter, but it’s not digital, so in the 0-50 range 13 and 14 volts are not much of a difference. Sorry the next lower range is 0-10 volts.
If this guage was a gas guage it would have the marks for
Empty…1/4 tank…3/4 tank…Full
No 1/2 full mark so it does not show a - discharge to the left and + charge to the right.
No numbers… only a icon of a battery in the middle.
There is also a light and chime that tells you to “Check Guages”. This comes on when the needle drops below the 1/4 mark. this always happens when the needle is on it’s way down to zero.
So this is not just that the battery is fully charged and I’m misreading the guage. It drops to the point where it would sit if you turned on the ignition, but didn’t start the engine.
This is what confounds me. I’ve never seen a guage that just…over a 10 second period, slowly dropped. I’ve always seen them just drop to zero in a flash.
I cleaned the posts and the clamps again with a wire brush and used a wire brush type post and clamp brush to clean everything. There was little if any corrosion …even the other day on the first try. I checked every connection I could find and all were clean and tight.
I removed the connections from the alternator and cleaned them real good and made sure those connections were tight. I couldn’t get the needle to drop while at my shop, but on the way home again I had the same problem after about 5 miles.
I happened to have the heater fan on and just a few seconds after the needle dropped to empty
(as if the engine was not started) and the warning light and chime came on…a few seconds later and I could hear the fan speed up a little as if the charging system kicked in, but no change in the needle. I stopped and tapped the post clamps and kept checking the guage, but it never went back up. It never goes back up durring the drive…like a connection was made.
When I got home again and it read Zero on the guage, I shut the truck off and waited about 15 seconds, started back up and the guage was back up at just past 1/2 if there was a mark for that.
I didn’t want to try going back to my shop because it was getting dark and with the headlights on I might not make it all the way back home from there.
FYI The battery is only a year old.