What does this ground wire go to?

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newbie78

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When I was working on my cooling system last week I broke a ground wire that was connected to a bolt on the water outlet. Is that the coolant temp sensor ground or ?
 

SunlitComet

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That is one of the grounds used by the pcm and some sensors. Very important one too. Please repair it and reattach it as soon as possible.
 

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