MercMonitor not recognizing fuel tank

[SuperDave20]

I just got my boat back from having the 350 Vrod hung on the back of my bay boat but I can't get the MercMonitor to pick up the fuel tank. It reads zero gallons. I input the gas tank size in gallons and calibrated it the default way.

How can I test my sending unit?


Ive checked the wires. The ground is attached to the mounting bolt on the sending unit and the tank 1 wire is mounted to the top of the sending unit. I pulled the cowling off to ensure that the fuel/oil harness was plugged into the side of the engine and it was.

Any ideas? I'm going to walk outside and get the serial number for the engine shortly.

[SuperDave20]

No one?

2B365763

[EuropeanAM]

Nice speaking with you today. Let me know how you come out after continuity testing the Tank-1 circuit.

[SuperDave20]

Thanks Don. I appreciate your time very much!

Continuity was good. I remembered you saying is it grounded to the starting battery... I double checked any it wasn't. It was grounded to the house battery buss bar! I re-routed the wire and tied it into the starting battery ground.. Boom! We have a reading!

So so that was it all this time. It was grounded to the wrong battery. Thanks-a-million for mentioning that little detail!