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paulvasey

Active Member

• Jul 12, 2013

• #1

I've just done a battery drain test with my multimeter with all off I'm reading about 0.08 amps ( 80 milliamps I guess) seems a bit high to me but does anyone know what it really should be?

 

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disco_mikey

Active Member

• Jul 13, 2013

• #2

Ideally, it should be down to 0.02-0.03A after 45 mins.

0.08A does not sound like it's high enough to worry about

 

Datatek

Well-Known Member

• Jul 13, 2013

• #3

paulvasey said:

I've just done a battery drain test with my multimeter with all off I'm reading about 0.08 amps ( 80 milliamps I guess) seems a bit high to me but does anyone know what it really should be?

Click to expand...

It's 30ma on the P38, I would expect the L322 to be around the same figure. the L322 takes a very long time to shut down to sleep mode. I think eightinavee is the man that knows

 

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paulvasey

Active Member

• Jul 13, 2013

• #4

I tested it 30 mins after locking it, as far as I'm aware it's all off after 16 mins. At that sort of drain how long would it take to go flat?

 

Datatek

Well-Known Member

• Jul 13, 2013

• #5

paulvasey said:

I tested it 30 mins after locking it, as far as I'm aware it's all off after 16 mins. At that sort of drain how long would it take to go flat?

Click to expand...

Depends on the size & state of the battery, 2 to 3 weeks at 30ma so could be around a week

 

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paulvasey

Active Member

• Jul 13, 2013

• #6

I see, it's not even lasting a week but as they also wake up every 6 hours and do there thing (which I understand can draw 0.5 amps for 16 mins ) then that would be about right? I'm thinking bout getting a solar panel. Anyone got one fitted ?

 

Datatek

Well-Known Member

• Jul 13, 2013

• #7

paulvasey said:

I see, it's not even lasting a week but as they also wake up every 6 hours and do there thing (which I understand can draw 0.5 amps for 16 mins ) then that would be about right? I'm thinking bout getting a solar panel. Anyone got one fitted ?

Click to expand...

Better to find out what is causing the excessive drain first, I use a 12 watt solar panel when I have to leave the P38 for an extended period, 5 watt would do the job.

 

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paulvasey

Active Member

• Jul 13, 2013

• #8

Ok, I leave mine for 4 days every week as I work away from home, are they ok plugged into to cigar lighter? Or best connected to the battery? Knowing how tempremental the l322s electronics are?

 

Datatek

Well-Known Member

• Jul 13, 2013

• #9

paulvasey said:

Ok, I leave mine for 4 days every week as I work away from home, are they ok plugged into to cigar lighter? Or best connected to the battery? Knowing how tempremental the l322s electronics are?

Click to expand...

Direct to the battery, on mine the cig lighter is not live with the ignition off. I've actually fitted a live socket in the boot so I can leave the solar panel on the rear parcel shelf.

 

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paulvasey

Active Member

• Jul 13, 2013

• #10

There is a perminant socket in the cubby box on l322 , do you think it would be ok in there?

 

Datatek

Well-Known Member

• Jul 13, 2013

• #11

paulvasey said:

There is a perminant socket in the cubby box on l322 , do you think it would be ok in there?

Click to expand...

If it's always live it should be OK.

 

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eightinavee

Well-Known Member

• Jul 13, 2013

• #12

It is 20-30mA as said,and around 16mins to go to sleep.During that 16mins there are some hefty spikes as various ecu's wake up then shut down.I stood and watched one once for the whole time via a current clamp feeding a scope.
The battery and charging system are pretty much at their limit even when in good nick....
Dont even think of fitting a cheap battery.

 

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paulvasey

Active Member

• Jul 13, 2013

• #13

Cheers , any tips on fining the culprit ? I guess it's difficult to start testing each fuse without waking the the bcm up

 

2.0_hippo

Well-Known Member

• Jul 13, 2013

• #14

Headlight wiper jammed ?

 

Datatek

Well-Known Member

• Jul 14, 2013

• #15

2.0_hippo said:

Headlight wiper jammed ?

Click to expand...

+1 or final stage resistor.

 

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disco_mikey

Active Member

• Jul 14, 2013

• #16

Sat Nav DVD drive

 

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Pgups

Active Member

• Sep 25, 2013

• #17

Have you had any luck finding the cause of your battery drain yet? I'm currently looking into the cause of mine. I have unplugged all of the above and I'm still getting a flat battery!

I'm just waiting for a fuse amp tester thing but as you say that may not work due to the Ecu's waking up!