Fuel tank sending unit replacement

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   I want to replace the fuel tank sending unit in my 90 SN. The fuel gauge itself has been tested and appears to be good 

The replacement sending unit has only two wires, but the gauge has three wires.

How can I find out how to connect the new sending unit to the old three wire fuel gauge?

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uncle-buck Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: June-14-2004 Location: United States Status: Offline Points: 327	Post Options Post Reply Quote uncle-buck Report Post Thanks(0) Quote Reply Topic: Fuel tank sending unit replacement Posted: November-20-2024 at 11:09pm
	I want to replace the fuel tank sending unit in my 90 SN. The fuel gauge itself has been tested and appears to be good The replacement sending unit has only two wires, but the gauge has three wires. How can I find out how to connect the new sending unit to the old three wire fuel gauge?
	1990 Ski Nautique (original owner) PCM 351W with D.U.I.

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11114	Post Options Post Reply Quote KENO Report Post Thanks(1) Quote Reply Posted: November-21-2024 at 7:02am
	It might help to know what you bought for a sending unit Here's your thread from last year in the link. link Guessing that you bought one of the reed switch types, here's a link to a thread with some wiring info link

uncle-buck Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: June-14-2004 Location: United States Status: Offline Points: 327	Post Options Post Reply Quote uncle-buck Report Post Thanks(0) Quote Reply Posted: November-21-2024 at 10:50am
	KENO, I purchased a KUS reed type sending unit which is scheduled to be delivered tomorrow. Read the thread you linked, but am still not clear on what to do with the third wire from the fuel gauge or dashboard. Thanks, as always, for your help.
	1990 Ski Nautique (original owner) PCM 351W with D.U.I.

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11114	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Posted: November-21-2024 at 1:30pm
	Here's a non artist's rendition of the back of a fuel gauge You'll have A terminal marked "I". It gets 12 volt power when the keyswitch is in the Start or Run position (purple wire) A terminal marked "S".It runs between the sending unit and the gauge (pink wire) A terminal marked "G". )Black wire) It goes to ground and to the black wire at the sending unit You need those 3 wires for the gauge to function, the blue wire is just for the gauge light. The terminals are marked on the gauge housing and can be in different positions than the drawing, so look for the markings So you hook the black and pink wires to the new sending unit wires and with the gauge wired like this, it should work.

Fuel tank sending unit replacement

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