For wiring the system uses a ground at each tank just like the factory installed system however only one signal wire is used. Most factory systems run a wire fromeach tank to the monitoring panel. The SeeLeveL system ties each tanks signal wire together so only one wire is run to the control panel. To simplify our install and avoid having to run any new wire we used the existing wires run from each tank and tied them together at the control panel end and in a sense made it one common wire. We soldered each connection and used heat shrink tubing on each connection to ensure a worry free install. The factory uses wire-nuts and some weren't holding very well.

Next we removed the factory control panel from the wall and opened up the hole slightly for the SeeLeveL panel using a roto-zip tool. The four existing signal wires from each tank which are now tied to the new sending units were soldered together and attached to the new SeeLeveL panels wiring harness according to the instructions. We also used the existing 12v supply wire & ground as well as the water pump switch wires attaching them to the color coded wiring harness. All that remained was to attach the new panel to the wall with the 4 supplied screws and test the system.