Since April very satisfied with my FF, but...........whenever I leave it for more than 2 days I get the "HDC inactive" message and when left for a week it will start but not very easy.
Done so far: new battery (Varta 110A), new alternator, new FSR. I have a constant battery drain of 30mA so I thought everything should be solved now. But still have the HDC message after a few days

When I connected the ammeter for more than a few hours I noticed a constant battery drain of 30 mA but after one or two hours it suddenly rises to 120 to 200 mA. This status lasts for 15 min. and comes up every ± 2 hours What is going on?
So far I consecutively removed fuses 34, 49 and 22 at no avail. What do you suggest as next steps? what fuses to be removed next? Very grateful for your brains

I am sure more expertise will be along shortly but I have heard of sunroof closure being an issue.

Also if you have a rear heater blower there might be a second fsr to replace

.. Howard
____________________________________________________
2002 4.4 V8 LPG Tartarini
Have RSW AllComms in Cheshire J17 M6 - happy to help.
*Gone: Classic Vogue SE Auto V8 3.9

Thanks for your reply.
Might be interesting about the sunroof. Next fuse to unplug will be the sunroof one.
I'm unsure if I have a rear blower. Will check that tomorrow.

its worth reading the following thread,

http://www.fullfatrr.com/forum/topic15891....tery+drain ... - .- -.




Y. O. L. O.
.

You have a rear blower We all do

Does your car ever shut down? (red light by gear lever after 10-20 minutes)

DVD NAV is the other area to check, but you may need to keep pulling fuses until you find the culprit .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

@ Stan; Thnx for this thread. (Was reading this one already and got distracted by the many useful threads in it )

@ Joe; OK, then there might be an extra FSR for the rear? Do you know where to access it?

Yes car completely shuts down (gear lever red bulb goes out as well); only needs 30 mA then, so seems OK to me. But then there is a sudden wake-up of something , goes up to 120 to 200 mA for only 15 min. This occurs every 2 - 3 hours.

Rangie4fun: Do you have front wipers or jets on your headlights? I was advised to pick out the fuse for the front wipers as they tend to cause a lot of draining problems.

I have another question relating to this issue: As I do not use my car much at the moment and I do not have access to a power outlet in the yard, I was wondering what would be the best way to prevent the battery from running flat? The car is a ´03 TD6 with a newish 110 amp Bosch battery.

In theory, how long would you need to keep the car running stationary in order to cover the initial cranking of the engine and top up the drained voltage (for example, the average drain over three days)? I try to drive the car as much as I can, but sometimes the car just has to sit for longer periods of time.

@SASS; yes I do have wipers/washers on headlights, so thanks for another useful direction to look for. The wipers fuse is now on the list. Do you happen to know which numer it is?

Regarding the re charging required I'm not sure what to advise you. IMHO it depends on how much "power" is left in the battery and how much electrical consumers (headlights, stereo, heated seats, window heating etc etc) you put on when driving the car as these all have to compete with the total output of the alternator. Best way to get an idea is to measure the battery voltage before you start the car and after you stopped the engine. Wait at least an hour (don't forget to already open bonnet otherwise when you open the car later the whole circus is going to start up) and put on lights for 10 seconds to eliminate surface charge, after that measure the voltage.

Last week I disconnected some more fuses at no avail
Gave the battery a regeneration charge and after that a thorough charge for some 48 hours at the same time decided that the time has come to fit the car with a second battery in the rr wing (beneath the fuse box). I fitted a master switch between -ve battery and ground connection. Done this on wednesday and since then used the FBH several times and no more anoying "HDC inactive" messages
Why didn't they do that from factory

Interested in the wiper fuse, does anyone now what number it is?

Headlight Wiper / Washer Relay, Fuse 28 30A on passenger compartment fuseboard.