'06 Montana 4340 having gas gauge issues - KEY ON Shows Constant Full
Took out the Sender/float and measured a full swing from UP [full] position 10 ohms to 127 ohms full down [empty]
Key OFF
Tank 1/3rd full 5 of 16 gallons [spec]
Gauge sits at E [expected]
Sender disconnected - 2 wire reads 43 ohms so seems representative of 43 / 127 = 33%
Key ON
Sender connected sits at F - ??? Does this indicate a short at the gauge wiring since it doesn't see the variable resistance caused by float moving??
Tried to simulate fuel level by putting a 30 ohm resistor across the gauge side wires with sender disconnected, still read full.
Sender disconnected sits at E [ normal expected infinite resistance seen by gauge ]
12vdc does exist on the 2 sender wires
Is the gauge bad or a short from the gauge to Sender connection?
How can you trace this issue to the source as it seems the instrument cluster is integrated into a circuit board and a common wire bundle goes into the dash rear?
Took out the Sender/float and measured a full swing from UP [full] position 10 ohms to 127 ohms full down [empty]
Key OFF
Tank 1/3rd full 5 of 16 gallons [spec]
Gauge sits at E [expected]
Sender disconnected - 2 wire reads 43 ohms so seems representative of 43 / 127 = 33%
Key ON
Sender connected sits at F - ??? Does this indicate a short at the gauge wiring since it doesn't see the variable resistance caused by float moving??
Tried to simulate fuel level by putting a 30 ohm resistor across the gauge side wires with sender disconnected, still read full.
Sender disconnected sits at E [ normal expected infinite resistance seen by gauge ]
12vdc does exist on the 2 sender wires
Is the gauge bad or a short from the gauge to Sender connection?
How can you trace this issue to the source as it seems the instrument cluster is integrated into a circuit board and a common wire bundle goes into the dash rear?