System Monitor troubleshooting help needed

[StuLawrence81]

I'm new to the forum and apologize if this has been beat to death before but searches show posts on troubleshooting tank sensors but not my exact issue. I purchased a 2007 Cardinal 30TS and we are on our first camping trip with it. Before we left I noticed the System Monitor is acting up. The only tank that lights up at all is the Galley tank. It currently reads 1/3 full which is likely accurate after 2 days. None of the other buttons read any level at all including battery. So for example if I check the fresh tank I don't get an E light, I get no light at all. I have confirmed that there is 13.3 volts at the back of the processor board. Is there a common connection that would be in the Battery, Grey, Black and Fresh circuits that I can check? Or just get a new circuit board?

 

[SeaDog-FRF]

Welcome to the forum its a great place to get your questions answered. It seem like it is the indicator that is not working have you tried switching the leads to see if you will get an indication of level. Example place a different tank in the galley connection. this is a guess on my part good luck let the forum know what you find. with that said I'm sure given the experts on the forum someone will have a better answer for you.