Blinking Test Light when Testing Water Temp Gauge (1 Viewer)

Joined
Aug 26, 2009
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Annapolis, Maryland
I recently started getting a faulty overheating reading on my temp gauge and tested yesterday to see if it was the gauge or the sender. When testing according to the FSM, I hooked up a test light to the wire connector for the sender and grounded it. The test result showed that the gauge is good and the sender is suspect, but the odd thing is that my test light blinked regularly instead of lighting constantly. Anyone have an idea on this one?
 

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