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Blow The Horn & Temp Indicator Goes Nuts? 700 1992

posted by  Michael Littman on  Tue Aug 28 13:21 CST 2007
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last visit: Tue Oct 14 16:49 CST 2014
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Ok, I am trying to work through all the weird kinks on my new-to-me 1992 740 non-turbo wagon. I noticed something weird with the temperature indicator last week. Today I think I nailed it down. It seemed to be fluctuating erratically with no rhyme or reason on my way to work. On my way home I hit the horn and noticed the indicator went nuts. It was then that I noticed I could trigger the erratic behavior at will by hitting the horn. Obviously something electrical is going on here. What should I look at? What is the connection between the horn and temperature gage? Thanks again!






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