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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 07-04-2013, 07:46 PM
e39-540 e39-540 is offline
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Location: Norfolk, VA
 
Join Date: Mar 2013
Posts: 2
Mein Auto: 1998 540i
lighting problems, please help

hello all, I have a 98 540i and I'm having some lighting issues hopefully you guys can help me, first as I was leaving work the other night i noticed that my headlights came on as soon as I started the car the switch was off and did nothing, no cluster lights, turn signals, parking lights, reverse lights, hazard lights or 3rd brake light, all fuses look to be good what could be my problem a few people mentioned the hazard light switch and/ or the lcm. any help is greatly appreciated
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  #2  
Old 07-05-2013, 01:32 AM
mjalloul11's Avatar
mjalloul11 mjalloul11 is offline
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Location: Lebanon
 
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Posts: 606
Mein Auto: 1996 528i 1999 MB c240
Usually any light issue is the work of the LCM. Was it once that it did it or always?
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Old 07-05-2013, 06:12 AM
e39-540 e39-540 is offline
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Location: Norfolk, VA
 
Join Date: Mar 2013
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Mein Auto: 1998 540i
it just started doing this, had had no issues up untill now
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Old 07-05-2013, 07:30 AM
cn90 cn90 is offline
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Location: Omaha NE
 
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Mein Auto: 1998 528i 5-sp 103K miles
Search forum for BTS426L1 chips.
Then buy a pair on ebay for about $14.
Solder them in and you just save $1000.
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Old 07-05-2013, 09:30 AM
edjack edjack is offline
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Location: San Jose, CA
 
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Mein Auto: '97 540i 6 speed
cn90,

From, what I've read, when the output transistor fails, the headlight stays on whether the ignition is on or not. Since all his external lights are affected, it's unlikely that all the transistors have failed at the same time.


e39-540,

When the headlights come on, turn on the passenger visor light. If this has an effect, likely the ignition switch is likely bad.

Otherwise, this may require DIS/MoDIC analysis.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

Last edited by edjack; 07-05-2013 at 09:31 AM.
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