greetings all. i am now the proud owner of my first f150 4x4. my new purchase stopped working it's signal lights on the way home from buying it. they worked when i chk'd out the truck, but don't now. the 4 way flashers still work fine, so bulbs aren't the problem. i suspect the flasher unit, but cannot find it. the fuses are all ok. any help would be appreciated. i have ordered a repair manual already, as none came w/truck. any recommendations for repair cd's? thanks.