ecm-b fuse blew on me two months ago. then blew last month, also gas gauge went wacky. this month truck won't start' but turns over ok. put new fuse in of course. fuel pump not running, swaped relay with horn relay no start. at underhood fuse box put jumper wire from ecm-b socket to prime socket, pump did not run. unpluged fp connector at pump. no power at grey wire both grounds are good tested for contiuity. i think i think i have a bad grey wire. my question is, wich connector under the fuse box is to the fuel pump.? thanks ahead of time from the newby