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Old 01-13-2004, 03:59 PM   #1
shadymilkman
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Member#: 44452
Join Date: Sep 2003
Vehicle:
2002 WRX
Aspen White

Default Speedometer problem...

My speedometer jumps all over the place when my car is running. Even it idle it jumps all over... Also the cruise control dosent really work, and sometimes the brights dont and neither does the foglight button.I have a stage 4 setup with a unichip. What the heck is wrong with my car?
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Old 01-13-2004, 05:56 PM   #2
Wagon Joe
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Member#: 34436
Join Date: Mar 2003
Chapter/Region: SWIC
Location: Tucson, AZ
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2018 Jeep Wrangler

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could be a blown fuse
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Old 01-13-2004, 08:14 PM   #3
shadymilkman
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2002 WRX
Aspen White

Default

ive allready checked all my fuses that i know of and theres nothing...
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Old 01-13-2004, 08:16 PM   #4
Mulder
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Chapter/Region: Tri-State
Location: NYC
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02 RAV4 MT
15 WRX/11 CRZ

Default

Check your connections at the battery terminals, be sure they are clean and tight.
Put a voltmeter on the battery when the engine is running to check that the alternator is charging properly, it should read 13.5-14.5V. With the engine not running the battery should read about 12.5V, any less and it may be weak.
It's also possible for the alternator to have a bad diode, if this happens it will still charge at a reduced capacity and also its output will be "dirty" with spikes that may cause malfunctions like you are having.
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