Quote:
Originally Posted by jaybutter
When I turn the ignition key to on the speedo needle vibrates for about 5 seconds. This happens when I turn off the engine also. When turning off, after about 5 seconds there is a relay clicking sound behind the dashboard and it stops vibrating. On startup the water and gas gauges do not work until the vibrating is over and then they pop up to the correct readings. Because this car had CAN B failure which required replacing the SAM unit and the window control and sunroof control modules I am worry that this condition may damage those modules again or maybe others. Any ideas? So far I cannot find anything when searching. No codes are being generated. Thanks in advance for your help!
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that relay sound are probably the gauges themselves or the turn indicator clicker.
I would start by looking at the ground condition, - there is a multi junction ground behind the gauges just like the W124. They are stacked on each other (poor design choice) rather than spread (better design choice)