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View Full Version : backlight problems and check engine light


dzrocks_11
01-18-2006, 09:09 PM
well i recently purchased a 1996 328is with 135k miles on it and i think i got a decent price for it, i am absolutly in love with the car but i want to get it to like-new condition, its pretty good right now with a few exceptions

i have 3 different light problems on my dash/controls and ill explain each seperately and id like to know if they can be easliy fixed by just replacing a lightbulb or something like that

1. the odometer doesnt light up at all, the lcd is good because i can (barely) make out the milage with my lights on when its dark out, i believe the speedo gauge lights it enough to see. the oil service thing right below the odometer i can see and it lights up good but the odometer itself along with the trip odometer doesnt lgith up enough to see.

2. the right side controls of my radio (i have a harman kardon premium system in there i beleive) dont light up, the radio screen lights up good but i cant see the controls on the right side of the radio in the dark

3. the lcd for the clock on the computer isnt lit up either, it works because in the right light i can see the time but its not lit up at all, the main screen that displays avg speed etc. lights up fine but the clock to the right of it doesnt light up

finally the check engine light is on, the previos owner assured me that it was nothing more than the o2 sensors needing to be replacedand i just want to clarify what iv found out about o2 sensors: there are 2 of them, one infront of and one behind the cat. both should be replaced at 100,000 or so miles, correct me if im wrong

and one more thing, what kind of oil do you recomend , iv checked the service records i recieved with the car and found 3 different wieghts of oil used 5w30, 10w50 and one other, some were listed as synthetic but the owner told me most times he had regular oil in there. so what do you recomend? synthetic, blend, mineral, 5w30? and would you change weeghts for the winter/summer months

i did searches on the lights and o2 sensor but i wanted the lighting clarified and i figured id just ask about the last 2 parts right now, thanks alot

Bmwcat
01-18-2006, 11:56 PM
The check engine light can mean a lot of things. Its best to have the codes pulled out of the computer by a mechanic or even your local auto parts store will sometimes do it for free. No sense buying parts until you know. Usually its a pollution-control issue. Good luck..:)

momo328is
01-19-2006, 07:48 AM
The OBC I believe has replaceable backlights. You should try getting the OBC out and try swapping the bulbs around to see if any are burnt out. Also, the OBC is notorious for having the LCD segments/pixels stop working. If that is your problem you'll have to replace the unit, I don't know of any way to fix it.

Fixing the Radio will at minumum require you to take the radio apart - if only half of the control lights are working then it is less likely that they are burnt out and more likely a circuit problem. I've fixed my radio before, but not the problem you describe.

I've never heard of the odometer issue before - most likely you'll have to replace the unit. Getting a new instrument cluster is pretty inexpensive if you find one on ebay.

As for the check engine stuff, if you don't have a code scanner and are not mechanically inclined, bring it to your local BMW mechanic. In my experince, check engine means something is wrong and it's gonna cost you to fix it.

If your intensions are to get the car to "like new" state, be prepared to empty your wallet.

dzrocks_11
01-19-2006, 02:36 PM
thanks, ive decided i should prolly try and get a shop to do the diagnostic test for me before i lay down 150 for new O2 sensors, ill see what i can do for the radio and OBC and see if i can find the culprit bulb or circuit

lmhester
01-24-2006, 07:33 PM
Recently got a 1996 328i and have the same problem with the clock. Did you get it fix? How?

dzrocks_11
01-24-2006, 08:16 PM
i received new bulbs today and im gonna give it a go this weekend, if i get it i will post how and if not i dunno....