440 Flat Batter (Again!)

[jlgrosvenor]

Originally Posted by Bruce_T

This weekend im removing the front seats to remove the carpet to wash out the coolant from when the Heater Matrix leaked.

Bruce,

If you are going to remove the seats, you really really need to check out THIS post.

[Bruce_T]

Thanks. Ive got a haynes and I will dis-arm the seat belt pretensioners.

Thanks guy.

WD40 on them tonight then!

[johnrh]

no its not loud,thought it was from abs block,but the relay is on the wing just in front of it.happens as soon as the engine is switched off,it does not matter if the key is in or out,or whether the car is locked or not,the drain happens straight away.after less than half hour, not enough power to turn engine,put a meter onto relay,and its definately something that is shorting the otherside.

[Bruce_T]

Thanks. Ill have a listen down by the ABS unit then.

Thanks

[Bruce_T]

I charged my battery till the charger indicated it was fully charged.

I then took it off charge and reocorded the voltage at different times through-out the day with the battery sat in my house. Here is what I collected.

Sunday
13.11 V 09:30
13.04 V 10:00
13.03 V 10:30
13.01 V 12:00
13:00 V 13:00
12.97 V 18:30
12:95 V 22:00

As you can see, its probably got surface charge. It didnt drop much at all.

Monday
12.92 V 07:30
12.91 V 12:00

Still has surface charge so I decided to hook the battery upto my car and carry out a parsectic load test.

The load test result where good.

My multimetre was set at 10A fused setting and the dial was on "10" the reading was 0.20 or 0.020 at "2" amp setting. ( I think il will have to double check tonight)

I then took the battery off the car and its now at 12.87/12.88 V which is still good.

So I think we can say that the battery is not discharging itself.

[Bruce_T]

With the red lead plugged into the 10A socket

The dial set to 10 I got 0.22 and when the dial was set at 2 I got 0.022

Thats fine isnt it?

[nano]

The dial set to 10 I got 0.22 and when the dial was set at 2 I got 0.022

No, thats not ok. You should have the same indication with both settings.
There must be a problem with your meter.

[Bruce_T]

Originally Posted by nano

No, thats not ok. You should have the same indication with both settings.
There must be a problem with your meter.

How so?

If im changing from 10A to 2A on the dial (Not the sockets where the probe connects) it will change decimal place.

[nano]

Originally Posted by Bruce_T

How so?

If im changing from 10A to 2A on the dial (Not the sockets where the probe connects) it will change decimal place.

In this case the 0.022 is an ambiquous indication and you should not consider it as correct.

The dial of 10A is working only with the special 10A socket. Usually, all other dials work with the general socket.

So, considering the 0.22A as the correct indication you have a serious leak if it stays for a long time (more than 5-10 mins).

[Bruce_T]

I dont mean to come across as obnoxious.

Im below a rookie level at this stuff and only recently bought one of these.

If I take a picture of the device in question maybe you could give me some pointers so I can check again to a greater depth?