How to wire up a fuel sending unit? - JustAnswer Jun 24, 2011Using an ohm meter check the ohm readings with the sending unit out of the fuel tank. Full 32 ohms. Empty 240 ohms. Half 110 ohms. If the readings are good on the sending unit check your continuity of the ground of the tank and sending unit. Here is a diagram of the wiring. Related searches for sending unit wiring diagram wiring a fuel sending unitfuel sender wiring diagramoil sending unit wiringboat sending unit wiringfuel cell sending unit wiringoil pressure sending unit wiringgm fuel sending unit wiringfuel pump sending unit wiring