This sender is different than the 73+ senders in that it has a bi-metal voltage regulator in it that makes testing it a challenge.
The 73+ sender, 83320-60050 is a variable resistor that changes value with level, 120 ohm E, 17 ohm F.
This is the inside of the 35020 sender:
The bellows to the right moves the bimetal strip voltage regulator, changing how long the points are closed, sending current to the gauge.
This is the other side of the bellows, you can see how the cam from the float rod moves the bellows up and down:
The resistance of this sender was found to be open circuit empty and 33 ohms full - meaningless numbers.
This sender can be tested similar to the way the oil pressure sender is tested, using a flashing bulb.
The 73+ sender, 83320-60050 is a variable resistor that changes value with level, 120 ohm E, 17 ohm F.
This is the inside of the 35020 sender:
The bellows to the right moves the bimetal strip voltage regulator, changing how long the points are closed, sending current to the gauge.
This is the other side of the bellows, you can see how the cam from the float rod moves the bellows up and down:
The resistance of this sender was found to be open circuit empty and 33 ohms full - meaningless numbers.
This sender can be tested similar to the way the oil pressure sender is tested, using a flashing bulb.
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