Trying to put a water temp gauge in a 2002 zr600 cce. Got my hot and ground off of the fuel pump and third wire to the sending unit, fired up the sled and let it warm up, gauge doesn't seem to work. Took sender out and put in a pan of hot water while still hooked up, still no signal. Seems like this thing isn't working or am I missing something. All ideas will be greatly appreciated.