Sending unit pulsing power (1 Viewer)

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Joined
Sep 13, 2015
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Location
midwest (iowa)
Trying to get the fuel gauge working on my ‘73. my test light shows the power pulsing going to the sending unit. there is no relay or reason I can think of that would cause this. Is it haunted?? As I turn on power, the light is solid for 5 seconds then pulses.
 
This is normal I believe. There is a voltage regulator in the fuel gauge that reduces the voltage from 12 to 7 volts and this causes the pulsing.
 

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