Battery issue?

[Tuctuc]

Hi,
I've noticed some odd behaviour on my 2017 enterprise van....

Several things are occasionally happening, firstly when I open the door the battery light flashes, at one point (only once) the touch screen went into eco mode within a few seconds of switching the ignition on, the radio doesn't always tune to the last station, and the right hand speakers randomly stop working but work again next time I get in it. 

Could this be signs is a bad battery, or possibly a bad connection somewhere? 

(it's had a teletrac fitted previously, there's a box still on the top of the windscreen and there appears to be a aftermarket led light to the left of the steering wheel - immobiliser?) 

Appreciate any advice 

Cheers Chris

[geoff]

A battery test will be free in most all Kwik-Fit type places and probably in every other place too - takes seconds.

I'd get it tested before doing anything.

Do you have a multimeter ? You can get a reasonable idea with a meter and also use it to test the alternator.

[Tuctuc]

Thanks Geoff, I'll dig out my old multimeter, failing that take it somewhere. I'll feed back what I find ?

[Tuctuc]

OK, so after a short couple of runs, the voltage is 12.72v, charging its 14.45v. But after an hour locked up the voltage dropped to 12.55v.
Either the battery is goosed or there's a drain on it?

[geoff]

Ideally you need to test the battery after standing idle.

After an overnight stop and before starting the engine is perfect.

[Tuctuc]

OK, battery charged off the van, standing idle after about 10hrs it's 12.95v.
Hmm sounds OK but may need a load of test to double check it.

I noticed on the - ve terminal some corrosion upto a sensor (battery monitor?), I'll clean this up up but starting to suspect a parasitic drain?

[Tuctuc]

OK, battery charged off the van, standing idle after about 10hrs it's 12.95v.
Hmm sounds OK but may need a load of test to double check it.

I noticed on the - ve terminal some corrosion upto a sensor (battery monitor?), I'll clean this up up but starting to suspect a parasitic drain?

[Tuctuc]

Battery reinstalled, and I've removed two aftermarket fuses for what look like the teletrac system so will see if that works