Question about 1989 BMW 3 Series

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Pc board hi.the service lights on my 1989 bmw 318i lights remain on all the time even after resetting. is it nessary to replace the whole cluster or only the pc board.

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This solution may be too late but will help others with same problem.
The E30 series have 2 rechargeable batteries on the (Service Indicator) SI board WHEN FITTED. located within the dash unit ( tacho/speedo/temp/fuel Unit) they have a life span of 6 years however mine lasted 17years not bad for a rechargeable batt
anyway back to the point the effects of a buggered batts are

  • Inconsistent taco and temp guages
  • background radio noise (old model radios)
  • and THE INABILITY TO TURN SERVICE LIGHTS OFF !
The batts can be found in CONRAD (germany) MAPLIN (uk)
the cos of the batts are approx £3
the new board costs direct from BMW with trade discount approx £200 in 2007
have fun (soldering required to replace batts) :-]

Posted on Jan 16, 2009

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