E46Fanatics - View Single Post - Speedometer maxes out when i turn car on
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Old 02-11-2013, 12:02 AM   #15
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Join Date: Jun 2012
Location: Honolulu
Posts: 230
My Ride: 325i, e36m3, s13
Voltage should be in the 13's when the car is running. A quick and easy alternator check is to start the car and then pull the ground off the battery. If the car stays running, the alt is working, if it dies the alt is bad. These cars start acting really weird when there is a voltage problem so the battery should be checked out also.
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