Battery draining

S

shinda1967@hotmail.co.uk

New member
Mar 18, 2013
1
0
Wolverhampton
Battery drainning... problem
Been adviced to change Battery
Starter Motor
Remote control censor....
The problem hasn't been solved I've payed a LandRover tech.. to come out Three times still pulling out my hair with this problem !!!!
 
A

apg

Well-known member
Dec 28, 2004
3,019
0
East Virginia
There's a old-school, low-tech way to find a voltage drain on any vehicle. No bloody computers needed....

Attach a test lamp between the negative battery terminal and the ground cable clamp, then disconnect the clamp whilst keeping the test lamp connected to both. (This will maintain power to the few circuits that always draw some power and get a mite cranky if you don't.) The brighter the light, the bigger the current drain. Start by disconnecting the alternator, as blown diodes will cause a big drain. Then, one at a time, pull fuses.... When the bulb dims, you've found the circuit with the drain.

Cheers

If you've paid a LandRover tech three times, it doesn't speak well for the quality of techs in your neck of the woods.
 
Colin hughes

Colin hughes

Well-known member
May 4, 2004
265
2
Cannington, Ontario
OK, are you living close to a hydro substation. The question may sound strange, but, we had a customer with this issue. The radio antennas in the back window were picking up signal power from the substation and turning the BECM on. It would go off and the power would cause it to turn back on. We disconnected the antennas and the problem went away.
 
J

jims95

Well-known member
Apr 20, 2004
203
1
Upland, California
You may have a bad alternator, even though it is charging the system with the engine running. You are experiencing the battery draining when the engine is off and not charging the system. The alternator in very few cases can draw from the battery at rest.

I had this problem years ago. The Land Rover mechanic I went to found that the alternator was the problem, and that this failure mode was rare.

1. Disconnect the alternator leads.
2. Fully charge the battery.
3. Check battery about 12 hours later. If battery is still charged, go to 4.
4. Connect the alternator leads.
5. Check battery about 12 hours later. If battery is discharged, the alternator needs to be replaced.

Let us know what you find.
 
jymmiejamz

jymmiejamz

Well-known member
Dec 5, 2004
6,010
362
36
Los Angeles, Ca
Colin hughes said:
OK, are you living close to a hydro substation. The question may sound strange, but, we had a customer with this issue. The radio antennas in the back window were picking up signal power from the substation and turning the BECM on. It would go off and the power would cause it to turn back on. We disconnected the antennas and the problem went away.
Click to expand...

I had that same problem with a customer car, I think they parked under power lines or something.
 
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