QuestionHello John!
I'm having some problem with my Discovery 2001, petrol 4.0.
My first question my explain my other. What is consuming energy (current) in the LR on a stand-by mode, armed (stock alarm).
Here is the problem:
About month ago on the morning my battery completely died. First I was thinking that i left something on so I charge it , it work for couple of days and then one morning died again. It happened 3 times before i decided to change for a new battery. I bought a new battery, put it in and guess what two days later same problem. I jump start the car drove to work (about 20 mi) and back. next morning same problem. I checked the alternator -- it works, giving 14 V. I was even trying to disconnect the battery while engine running -- works great.
I pretty much know a lot about electrician since i work as a industrial mechanic, but this is driving me crazy...
Please help if you can.
Thank you.
AnswerHi Andrey,
you'll have to start searching for this short. It could be within the alarm system ... that includes most of the security sensors.
There is no one component that is most obvious to start with. You'll have to get organized, record which fuse you pull and leave the vehicle overnight. In the morning, if the vehicle starts, you'll now have a general idea where to look.
Here's a list for the passenger fuse box:
Fuse#, Rating Amps, LR Model - Function
F1 25 ALL - RH front door lock motor, LH front door lock
motor, RH rear door lock motor, LH rear door lock
motor, tail door lock motor.
F2 10 ALL - Fuel flap release switch.
F3 10 ALL - LH Headlamp main beam bulb.
F4 10 ALL - Rear fog lamp switch, trailer socket, header 295.
F5 15 ALL - Daylight running lamp relay.
F6 25 ALL - Rear blower motor relay.
F7 30 ALL - Blower motor relay.
F8 30 ALL - HRW element, drivers door mirror, passenger
door mirror.
F9 10 ALL - LH Headlamp dipped beam bulb.
F10 10 ALL - RH Headlamp dipped beam bulb.
F11 10 ALL - Header 286.
F12 30 ALL - Sunroof ECU.
F13 30 ALL - Rear window lift relay.
F14 20 V8 - Ignition coils
F15 20 ALL - IDM, header 291, header 761.
F16 15 ALL - Radio/cassette player, aerial, PDC ECU.
F17 15 ALL - Audio system power amplifier.
F18 15 ALL - Rear screen wiper motor.
F19 15 ALL - Header 292, windscreen wash/wipe switch.
F20 15 ALL - Transponder coil, header 294, header 725.
F21 15 ALL - Header 292, header 293.
F22 10 ALL - RH Headlamp main beam bulb.
F23 10 ALL - BCU, starter relay.
F24 10 Td5 - EAT ECU, header 287.
F24 10 V8 - Ignition relay, EAT ECU, ECM.
F25 15 ALL - Brake pedal switch.
F26 10 ALL - Auxiliary relay.
F27 10 ALL - Header 760.
F28 10 ALL - SLABS ECU.
F29 10 ALL - BCU, ACE ECU, IDM.
F30 20 Td5 - Mirror switch.
F30 20 V8 - Cruise control switch, mirror switch.
F31 10 ALL - Header 289, ATC ECU, fresh/recirculated air
switch.
F32 25 ALL - Accessory socket.
F33 10 ALL - Header 290, header 759.
F34 30 ALL - BCU.
F35 10 ALL - Instrument pack, SRS
SO...with a fully charged battery, record which fuse you pull; wait overnight; IF the Disco starts in the morning, the fuse you pulled (and all its associated components) are suspect; further diagnosis is required within those components.
IF you pull a fuse and the battery is DEAD the next morning, you have NOT yet isolated the problem to any components.
Example:
PULL Fuse F1 - door motors. IF the next morning, the battery is good, the short has something to do within the door motors - which one? Requires further bench tests.
Best of luck,
JohnMc
