Waste Tank Indicator 2004 Chaparral Sig 260

I just bought a used 2004 Signature 260 and the waste tank indicator shows FULL all the time. I pulled the sending unit (pee-eww!) and cleaned and freed up the floats. Looks like there are two floats. One for 3/4 full and another for full. I checked with an OHM meter and they pull anywhere from just over 0 ohms to over 1.4 M ohm throughout their range of travel, so it seems that they are working properly in this regard. Problem is, it almost seems to be working backwards. If I turn the sending unit upside down simulating a full tank, then the indicator in the head reads 3/4 full and Full at the same time. As it stands right now, it looks like at least I can tell when tank is full (by when 3/4 full light comes on). Unfortunately by then it will be too late as I won't have the advance warning as to when to start looking for a pumpout. I was just wondering if anyone has any experience with this type of system. I do not know who makes it as I didn't receive any literature with the boat purchase.

Re: Waste Tank Indicator 2004 Chaparral Sig 260

I had a similar issue. Maybe u flipped something around or changed a wire accidentally on the unit? My indicator always shows 3/4 full no matter what. I replaced the whole waste system any way so never exactly found out what the issue was...

Re: Waste Tank Indicator 2004 Chaparral Sig 260

what is the voltage, might have some corroded wires

Re: Waste Tank Indicator 2004 Chaparral Sig 260

what is the voltage, might have some corroded wires

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great idea..check all wires with a voltage indicator. Maybe even a short somewhere

Re: Waste Tank Indicator 2004 Chaparral Sig 260

Thanks, I will try that and post any results/findings

Re: Waste Tank Indicator 2004 Chaparral Sig 260

Try the Chaparral factory owners forum. It's very active and the owners are very knowledgable. Most have larger boats on there.