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Battery draining advice

cococola

cococola

New member
If my lux stands for 4 days unused the battery drains totally flat.I have tested the battery(even though it is 2months old)and it is fine.I removed the battery earth lead and connected my meter between the battery terminal and earth lead,removed each fuse to see if there was a problem.
The only difference that I noticed was on the hrw fuse removal,my volt reading was 0.20 before fuse removal and then 0.05 after fuse removal.
I checked the alarm volt drop which was fine(0.01) so my question is would the hrw voltage be sufficient for causing my battery drain and is there any other tests that I can try?
Any advice would be very helpfull.
 
You need to be measuring current or amps. Remove the +ve lead and put your meter set to amps between the removed lead and +ve of the battery. Do not try and start the car like this as you will melt the leads and destroy your meter. Also make sure neither touch the chassis.

You should see a small current flowing. Remove 1 fuse at a time and the circuit that is draining your battery will show a reduction in current.

I'd start with the alarm - if you have one.

Rich
 
I had this problem and it turned out to be my porsche fitted immobilser draining the power, would be flat in 3 to 4 days of non use, the fuses to this were located drivers side under the dash. Got a new one fitted and if i don't use the car for 10 days + it still starts fine!
 
Went to my Lux this morning and it started 1st time with no battery issues,this is with the hrw fuse removed previously.My next step is to trace if it is the switch or what ever else related to the hrw.I had some non standard tailgate struts going back to before xmas and had to earth the struts myself as the hrw didnt work could this be the problem maybe? Idid use a test light when earthing the hrw previously and the light went out as I turn the hrw off so I would have thought this was ok?
 
Definitely! The tailgate struts are sided and they are commonly fitted in the incorrect positions, causing all manner of electrical gremlins (shorting indicators on series one cars being common, but it depends on the model of 944 and the strut combo). Id remove any supplementary wiring and fit a correct pair of struts which you need to source from a knowledgeable supplier, such as an OPC, or Bert Gear.

Simon
 
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