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Old 09-07-2009, 10:09 AM
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Old 09-07-2009, 10:25 AM
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Please do not post with your caps lock on, it's considered screaming.

Did you after market fuel gage not come with instructions and a sending unit? If you are trying to use an after market fuel gage with an OEM sending unit you will have to modify the OEM sending unit to the proper resistance the after market gage operates at.

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Old 09-07-2009, 11:16 AM
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I'll echo what Vince said. The fuel gauge requires a specific sending unit resistance to operate properly. If you got lucky and happen to have a gauge that uses a sender with the same resistance as stock, you should be able to wire it up using the same wires as stock. If you have a gauge that requires a sender with a different resistance, you need to get the correct sender for that gauge and install it in the tank.

Depending on the resistance of the stock sender and the requirements of the gauge, you MIGHT be able to build a voltage divider circuit to match the old sender to the new gauge.
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