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  #1  
Old 03-20-2010, 06:13 PM
JWJ JWJ is offline
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Location: Raleigh, North Carolina
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Instrument lights mystery

The instrument cluster night lights in the '85 300TD stopped working a few months ago. The bottom row of status lights work fine.

I've replaced the bulbs, replaced the rheostat, soldered the leads on the rheostat, and checked the fuses. Still no lights.

Are there any other possible causes?

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  #2  
Old 03-20-2010, 07:20 PM
Pili380SL's Avatar
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Location: Springfield, MO
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I imagine you've checked for 12v at the pin on the cluster connector....I'd start tracing on the circuit board and see where you're losing voltage. Do not just check for continuity...high resisitance will show continuity but not allow enough voltage to light the bulbs.
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Old 05-09-2010, 01:36 PM
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Location: Colonie NY
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For what its worth I just had a similar issue on my 300E. The gauge lights worked fine but the rest of the dash, center console and rear window switches were out. Turned out to be a small rectangular looking fuse on the back of the cluster. Mine was indicated by a red plug

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