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Old 11-29-2012, 03:58 PM
woodenbmw woodenbmw is offline
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Location: Virginia Beach, VA
 
Join Date: Apr 2012
Posts: 88
Mein Auto: 1987 BMW 325
I don't know about testing the gauge sensor, on my 87 325e however, the fan operates from two sensors located on the radiator. One for low speed, the other for the high speed fan. You can test them by jumping the terminals together. If the fan comes on, replace the sensor. I hope this helps.
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