Annoying trip odo reset issue solved....

[Erik Brannfors]

My ’91 M5 sits outside a lot, rain, snow, sun, wind, etc as the e30 M3 and e24 M6 (race car) are in the garage. Moisture is prevalent here north of Seattle, and that creates problems. Over the past few months I’ve noticed that the trip odometer “button” has functioned intermittently – sometimes 8-10 presses before it would reset the counter. This past week, the counter reset to zero and stayed there while driving. Then, when parked with the ignition off, both the odometer and trip meter LCD stayed on all the time.

 

Pulled the cluster, extracted the PCB from the housing, and found corrosion in the “hole” that the button plunger goes into and corrosion on the end of the plunger tip. Cleaned off the tip of the plunger – just plastic. Carefully (pin and magnifying glass) picked out/off the buildup in the hole and on the contacts. Reinstalled, working like it should.

 

Lesson learned – drive the car more often with the heat turned up to dry it out J

 

 

ERIK BRANNFORS

Cell: 206-356-5620
LinkedIn Profile

 

[Gary Derian]

Temperature swings cause all sorts of humidity problems.  A cold spell chills the car, then a warm spell, with the dew point higher than the chilled parts, causes water to condense all over and inside connectors, circuit boards, etc.  A small heater inside the car will solve this, but don't burn the car down.  I have the same problem with my garage.  Spring is the worst for such temperature swings.  We are getting polar air here for the first time in several years, I will be running my garage heater during the thaw.

Gary Derian

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