| Greenco1036 | -- 05-31-2025 @ 11:06 AM |
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1953 ford f-250 pickup with original v8 flathead. I replace the original tank, sensor & gauge with all new & replaced wiring. Sensor is grounded. Fuse blows when power turned on every time. Please help
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| carcrazy | -- 05-31-2025 @ 2:41 PM |
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Which fuse is blowing? The sending unit in the tank should be grounded through the fuel tank ground. For the fuse to blow, you must have a short somewhere in the wiring that goes from the battery negative terminal to the instrument panel or other "hot" wires in the harness.
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| Greenco1036 | -- 05-31-2025 @ 3:12 PM |
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Thanks for the reply. The sending unit is grounded to the frame . I have a fused wire to the gauge and then a wire from gauge to sending unit. The hot wire fuse is blowing. Could there be a short wit the sendin unit itself?
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| 40cpe | -- 06-01-2025 @ 6:26 AM |
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One of the mounting screws for the sending unit should be grounded. The only wire on the terminal of the sending unit should be the wire back to the gauge. To eliminate a problem with the sending unit, disconnect the wire from the sending unit and retry. If it still blows the fuse, disconnect the sending unit wire from the gauge and re try. This message was edited by 40cpe on 6-1-25 @ 6:30 AM
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| Greenco1036 | -- 06-01-2025 @ 10:24 AM |
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Thank you very much again. You are guiding me through the process. There is a blade terminal on the outside of the top of the sensor which I just assumed was for the ground. False assumption?
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| Greenco1036 | -- 06-01-2025 @ 11:08 AM |
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Just for clarification, do have a wire on top of the sensor which is an o terminal bolted on directly on top of sensor which runs to the gauge
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| 40cpe | -- 06-01-2025 @ 12:50 PM |
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I haven't seen a sending unit with two connections, but I haven't seen everything. The connection for the wire to the gauge should have some visible insulation around it. I would first disconnect the ground wire and try the fuse. A close-up picture of the wire connections with all wires removed would help.
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| JayChicago | -- 06-01-2025 @ 1:10 PM |
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Problem is more likely on the power side of the gauge., not the sender side of the gauge. What fuse are we talking about? Is this an aftermarket gauge you added?
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| Greenco1036 | -- 06-01-2025 @ 3:16 PM |
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Attached a visual showing how I have it wired now. Blown fuse is at the fuse block. Six circuit block with no troubles with other circuits. Ground wire is attached to spade terminal which was how sender came out of box. Sender to gauge wire is attached to a threaded bolt which was there out of the box. Gauge is original gauge which was working before replacement parts. Thanks to everyone again
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| JayChicago | -- 06-02-2025 @ 11:51 AM |
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Understand now that all you have done electricly is the new sender. And appears to me you have it wired correctly. At this point I would start isolating: Remove sender wire from gauge and see what happens. If now ok (fuse does not blow), tells you problem is in the sender sub-circuit as you are suspecting. Re-connect to gauge and remove wire from sender. If now still ok, tells you wire is ok. Re-connect to sender. If now still blows the fuse, tells you short must be in the sender itself.
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| Greenco1036 | -- 06-02-2025 @ 12:03 PM |
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Thank you very much for all your help. I will go through your steps & hopefully come up with the answer.
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