1984 BMW 318 SPEEDOMETER

Tiny
TPIJOE
  • MEMBER
  • 1984 BMW 318
  • 4 CYL
  • 2WD
  • MANUAL
  • 223,358 MILES
PLEASE HELP ME DIAG. SPEEDO NOT WORKING. VSS @ REAR IS NEW AND SHOWS ON-OFF-ON-OFF W/OHM METER WHERE DO I GO NEXT? ARE THERE ANY COMMON FAILURES?
Wednesday, April 2nd, 2008 AT 6:15 PM

1 Reply

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Yes there is a common issue with E-30 instrument clusters. The driver chip fails and the remedy is either seeking out a speedo/tach repair service or outright replacement of the speedo and or the cluster and or the service interval board (the narrow circuit board with the nicad cells soldered to it) I would start with a visual inspection of the disassembled instrument cluster and go from there. If the batteries are old and leaking the service interval board will require replacement. Repost to me or send a PM if more assistance is required.
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Thursday, April 3rd, 2008 AT 12:32 PM

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