MattHSC400

Kinda late to the topic lol, I have a 97 SC400 owner before me did a electric fan swap and connected it to the thermostat sensor which doesn't seem to be doing the trick of turning the fan on when the car is needing to be cooled, so id like to just connect the electric fan directly to the ignition so that it will always be on when the car is running but I am not sure which power source is the ignition power source and is there anything else i need to do besides having the fan connected to the battery and then to the ignition source any other connections that need to be made?

Has anyone deleted the back seats if so how much do they way, Bought my 1997 SC400 with the backseats already taken out (only thing you can see is the chassis of the car its self?) panels of the doors replaced with LRD panels and a smaller battery, I think that's everything that was done. How much weight reduction would you think that is over all.