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Recently my 1989 1.6d NA golfs engine temperature gauge has been acting weird - sometimes working but sometimes dropping dead. I think it started after washing the engine, but I'm not 100% sure cuz I didn't spot the exact moment. I guess there are two possibilities, either the temp sensor is broken or there`s some problem in wiring? So my question is, where actually is the temp sensor located and how to test where`s the problem?

And also, just to be sure, I know that in newer cars there`s some electronics that watch the engine temp and adjust fuel mixture (and my smth else) accordingly, but I guess in such an old car there`s no such thing, especially cuz it has manual choke . So I guess I won't do no harm driving while I fix the problem?

Thanks in advance!
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