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#1
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Gas Tank Sender Question
Not really "electronic" but...
I was going along and suddenly my gas gauge flipped to the max. The sender is resistive type with "wiper." I disassembled it and found nothing wrong. Checked the ground connection to the tank, as well as the wiper connection. All appeared to be in order. Any ideas would be much appreciated. Thanks. Frank |
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#2
posted to rec.boats.electronics
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Gas Tank Sender Question
Frank,
Depending on the vehicle, it is not uncommon to use a voltage regulator in the gauge assembly, as raw battery voltage moves around 25%. If the regulator fails, the gauge will read max fuel. Steve "frank1492" wrote in message ... Not really "electronic" but... I was going along and suddenly my gas gauge flipped to the max. The sender is resistive type with "wiper." I disassembled it and found nothing wrong. Checked the ground connection to the tank, as well as the wiper connection. All appeared to be in order. Any ideas would be much appreciated. Thanks. Frank |
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#3
posted to rec.boats.electronics
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Gas Tank Sender Question
Hi Frank,
American fuel senders usually have a high resistance when the tank is empty and a low resistance when the tank is full. A short on the sender wiring would make that type of gauge show maximum. I suggest that you disconnect the sender wire at the sender and see if the gauge still shows full. If so, disconnect the sender wire right at the gauge and see if the gauge still shows full. If the gauge still shows full with the sender wire disconnected from the gauge then the gauge is stuffed. -- Best Regards, Bert van den Berg CruzPro Ltd. www.cruzpro.com 13 Burgundy Park Avenue Henderson 0612 New Zealand "frank1492" wrote in message ... Not really "electronic" but... I was going along and suddenly my gas gauge flipped to the max. The sender is resistive type with "wiper." I disassembled it and found nothing wrong. Checked the ground connection to the tank, as well as the wiper connection. All appeared to be in order. Any ideas would be much appreciated. Thanks. Frank |
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#4
posted to rec.boats.electronics
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Gas Tank Sender Question
Hi NZ-
With the sender wire disconnected the gauge reads zero so I know it's not the gauge. So I would guess the sender wire is shorted to ground, would that make sense? I think I need to examine the sender again to see if some of the insulation has deteriorated. On Tue, 3 Aug 2010 19:42:08 +1200, "Bert van den Berg" wrote: Hi Frank, American fuel senders usually have a high resistance when the tank is empty and a low resistance when the tank is full. A short on the sender wiring would make that type of gauge show maximum. I suggest that you disconnect the sender wire at the sender and see if the gauge still shows full. If so, disconnect the sender wire right at the gauge and see if the gauge still shows full. If the gauge still shows full with the sender wire disconnected from the gauge then the gauge is stuffed. |
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#5
posted to rec.boats.electronics
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Gas Tank Sender Question
Steve:
I would not have guessed this. I am going to examine the sender again and if I find everything in order, I will look to the gauge. Thanks. Frank On Tue, 3 Aug 2010 06:17:16 +0200, "Steve Lusardi" wrote: Frank, Depending on the vehicle, it is not uncommon to use a voltage regulator in the gauge assembly, as raw battery voltage moves around 25%. If the regulator fails, the gauge will read max fuel. Steve "frank1492" wrote in message ... Not really "electronic" but... I was going along and suddenly my gas gauge flipped to the max. The sender is resistive type with "wiper." I disassembled it and found nothing wrong. Checked the ground connection to the tank, as well as the wiper connection. All appeared to be in order. Any ideas would be much appreciated. Thanks. Frank |
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#6
posted to rec.boats.electronics
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Gas Tank Sender Question
I have a '96 Harley Road King that just suffered the same fault.....I wouldn't have guessed it either, but after replacing the
gauge with success, I disassembled (destroyed) the old gauge and low and behold.... a VR. Live and learn. Steve "frank1492" wrote in message ... Steve: I would not have guessed this. I am going to examine the sender again and if I find everything in order, I will look to the gauge. Thanks. Frank On Tue, 3 Aug 2010 06:17:16 +0200, "Steve Lusardi" wrote: Frank, Depending on the vehicle, it is not uncommon to use a voltage regulator in the gauge assembly, as raw battery voltage moves around 25%. If the regulator fails, the gauge will read max fuel. Steve "frank1492" wrote in message ... Not really "electronic" but... I was going along and suddenly my gas gauge flipped to the max. The sender is resistive type with "wiper." I disassembled it and found nothing wrong. Checked the ground connection to the tank, as well as the wiper connection. All appeared to be in order. Any ideas would be much appreciated. Thanks. Frank |
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