If u mean fuse for webasto heating it is second from the back! If u have webasto... but u can connect webasto directly with just one wire... I have T60 telestart with 3 pins only...if u have FL car than u have T90 telestart with 10pins may be, but with 3 wires any way!... it is located near battery with radio model! But I disconnect webasto because it takes more fuel when it is pumping together my diesel