Vehicle & Technical > Discovery

Battery Charging Problem (Help)

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chris9119:
Thanks all for feedback.

Have swapped batteries and after a week, that one has same fault. Have put two new earth straps on to engine. Fitted new starter (thats 3 in seven months!!)

Still confused so further advice would help.....

Chris

Wanderer:
Clutching at straws but could it be the split charge relay has got duff connections causing high resistance which means Battery 1 isn't getting a full charge.

When this happened to me it turned out to be a number of different hings that only seemed to clear fully by swapping the relays on the started circuit as well as the starter motor.

It could be earth leakage somewhere.

Ed

chris9119:
Hi Ed

The split charge relay only serves the second battery (14.22 volts). The primary battery is still feed in the same way (13+ volts).

I can't see why one battery gets 14+ volts and the other 13+ volts (on the cable).

I would have thought that 13+ volts would be ok to keep the battery charged if I'm only using the radio and fan.

Still :?

Chris

Wanderer:
The first battery will not charge as well as the second one due to the volt drop.

It's strange that the main battery is getting less voltage. It could be either of the pos or earth cables that has a bad connection.

Thinking about it. I've seen the wires start to break where the alternator cable connects to the battery.
Could it be that that is causing the volt drop? Try running a new thick wire on the supply to the battery or measure the voltage at the back of the alternator.

Ed

Range Rover Blues:
You need to check all the connections by measuring the voltage accross them with a good voltmeter.  Somewhere a supposedly good connection will show a drop of about 1 volt, or several connections will show part of a volt each.

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