Battery degrading VTII V6

[commodoredave]

if it was parasitic draw battery would keep going lower
or do you always restart car after 3 days

car is driven most days. battery goes from 12.6 to 12.2 ( driven daily or not) and stays at 12.2. Cold cark is just under 10v so heaves a bit when starting.

https://housetechlab.com/how-to-check-for-battery-drain/

That vid was quite good. Thanks for posting.

 

[BowTie]

You're welcome bloke.

Hope you find it.


Just another thought.
I've had the occasional random drain from sticky window switches.

Make sure they all self centre and don't catch.

 

[commodoredave]

https://housetechlab.com/how-to-check-for-battery-drain/

Ok did the test. Only the illumination fuse ( both switch and fuse) showed a power draw. No lights show when car is switched off so not sure what is drawing the power. SomEthing shorting maybe????. What might be the next level of trouble shooting.

 

[BowTie]

If a positive supply wire is shorting it should show continuity to ground/earth/chassis, I think.

Let me think about it for a bit.

 

[Ginger Beer]

Get you system tested, I recently had a battery die, it was pretty old though, the "Holler for a Marshall" guy tested the battery, alternator, stater motor and power windows, eveything passed except the battery.

45 minutes after the initial phone call to them I had the battery replaced and system tested with a 3 year warranty, all for the very reasonable price of $200

 

[BowTie]

Leave the fuse in place and check for continuity between fuse and gnd.

Would indicate a short on that circuit unless intermittent.

You'd think a short would blow the fuse though so now im not sure.

Getting close to auto electrician territory here.

Could a shorted bulb cause the low current drain without blowing the fuse? Anyone?

 

[1985VK]

Short trips can slowly drain a battery because the alternator does not have enough time to replace the energy taken out to start the car.

 

[1985VK]

car is driven most days. battery goes from 12.6 to 12.2 ( driven daily or not) and stays at 12.2. Cold cark is just under 10v so heaves a bit when starting.

THIS.

Does the battery have the CCA to handle the cold cranking? A car battery in good condition should show more than 12.6V at rest and over 14V across the terminals with the engine running.

 

[BowTie]

It also shouldn't drop below 10v while cranking.

But, you do all realise he has identified a leaking circuit that a new battery and or alternator wont fix dont youse?

 

[1985VK]

It also shouldn't drop below 10v while cranking.

But, you do all realise he has identified a leaking circuit that a new battery and or alternator wont fix dont youse?

Thanks, I didn't realise that. The OP can try a voltage drop test on the battery negative terminal to ground and same for the positive terminal to see what the voltages are?