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Discussion Starter · #1 ·
Hi, i have r50, 2003 sidelights, taillights and instrument illumination switch them self on randomly and stay on, when driving, while standby or locked. I have to disconnect the battery to get them off, but only 30 minute battery disconnected helps but they manage to switch back on eventually. Please help bc1 is dry as bone.. :( it all started after battery terminals came lose and i had compleate loss of power on start up.. had to hold them to start the car, it happened few times as i didnt t have 10mm to tighten... Now my battery is drained...
 

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Discussion Starter · #5 ·
Hi, checked tail light ground which are OK, the issue started after my battery terminal came lose. the car lost all power on start all dash light switched off and no power. After i tightened the terminals it started ,but this appeared about 2 days after now i have about 30mins to 1 hours before they come back on and there in no way to get them off.
 

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If you've checked the ground locations then try checking the relevant fuses etc...


The BCM could also became faulty after the loose battery terminal.

 

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this guy can clone the bc1 body control modules dale PHONE NUMBER 07807 222262
 

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also would of been worth while doing a power latch process on it as per below
How to reset all ecu's

this procedure is called a power latch

firstly turn on the ignition not engine running,
open bonnet remove battery positive lead and then turn off ignition.
then touch the positive lead to earth,this powers down all ecus and resets erasing intermittent faults in the process.then reconnect the battery lead.
if the vehicle doesnt start straight away leave the ignition on for 2-3 mins as it has gone into anti scanning mode.

IMPORTANT PLEASE READ CAREFULLY
upon starting the vehicle DO NOT TOUCH THE THROTTLE allow vehicle to idle until cooling fans cut in to allow the engine ecu to reset correctly and reprogramme the learning curve,then drive in all gears upto 4,000 rpm accellerating steadily.

as stated this resets all ecus so any electrical faults caused by conflict errors in programming will be erased and fixed.if the fault is still evident there is a problem that will need further diagnosis
as might find the battery terminal not tight had messed with it .
 
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