i just bought a 1992 7.3 when i put the ignition in the on position my wait to start wont come on. i doubt it is a fuse cause sometimes it will come on, any ideas. also in the mornings when i go to sart it i get no light so i wait for about a minute to start, turn the key, it cranks but wont start. i put it back in the run position try again and it starts. the temperture hasnt been getting lower than 45 at night. this is my first diesel so im new to it all. just trying to figure it all out. any ideas?