Thread: Leaking Voltage?

Have you checked the negative connection to the chassis.


Ken

As Ken posted, start with checking all power cable connections, both negative and positive cables.

A question or two.

How often do you drive and when you do, how long do you drive for.

Also, in the mean time, disconnect the SC80-LR at the plug on the driver’s side and see if your cranking battery goes flat more often and/or quicker.

BTW, do you have a multi meter?

I have been driving 750k a week!
So I think the charge should be there!
I've recharged both batteries with the link pulled apart and I'll leave it that way until I find the fault.
At least if they are not connected they both won't be at a sub starting level as they have done before. ( And I'll have a battery to start off!)
Yes I have a Multimeter.
Today I checked them when I could not start and they both where at 11.8v

I'll check the Earths, I know where the Aux battery one is but the Main one is?

COLD morning ?

I noticed the other day that my Aux batteries was down under 12 Vdc.

Moved vehicle from garage to around the front into the sun. I noticed that no secondary charge was made (main was too low for that to occur).

Went out after an hour and secondary was back to over 12 vdc.

Reminds me of years ago when I had to place a heat source overnight, under the engine & another under the fuel tank in the old nissan when I was working up the snow & camping out every night for 3 months.

Sydney Northern Beaches does not get that cold and last night was about a min of 12 deg. In my garage I'm sure it was warmer than that so I don't think that is it seeing I had the prob 6mths ago as well.

Originally Posted by ~Rich~

I'll check the Earths, I know where the Aux battery one is but the Main one is?

Hi Rich, the cranking battery earth is in the same place as the auxiliary battery's earth, on the passenger side, but it can be hard to get at.

You can do an earth test with your multi meter, just measure the voltage difference between the cranking battery’s neg post and one of the earthing points just in front of the cranking battery compartment, in the side of the guard.

With the motor running, you should have a “0” reading if all is well.

Originally Posted by ~Rich~

I had the alternator replaced last year.

Are the alternator bolts still tight? With the motor idling and with some extra current load (eg lights on), check for possible voltage difference between the alternator casing and the block.

Thx guys,

I checked for any voltage difference between the Earth point in front of the Main battery once started.
There was a 0.01 difference with the Multimeter set to 20v range.

I latter checked it again with my Multimeter set to 2v range with the engine off and found a 0.02 difference.

I then checked the Aux battery which is still unlinked to teh main and did not find any difference.

Would that be enough to cause the issue?