[img]httpss://i736.photobucket.com/albums/xx9/exit39/Ford%20F150/2625735c-orig-1.jpg[/img]
Now on to a problem that's happening.
To preface this, the cowl under the windshield has had a serious leak for years that the previous owner tried to fix, but couldn't. The tray is completely rusted through in some areas, and when it rains heavily, the water will run down the inside of the firewall into the cab. We removed the carpet because of the musty smell. I did a quick fix to the rusted through areas with A/C foil tape and some undercoating spray. Apparently I've missed some areas because it still leaks.
Recently, the #18 fuse keeps blowing out. #18 is a 10 Amp fuse that controls the Speedometer and Electronic Shift Module amongst other things, however I only mention those because these are the main issues: The speedometer/odometer don't work and it will not shift up from 1st gear. I do not have a wiring schematic, but I traced the wires to the firewall and ended up unplugging the three harnesses anyway to see if water had got into them. It looks as if it has, so I cleaned them up and ran a fan all night to dry them out.
Because I do not have a wiring schematic my question is if there is something else in that wire loop from the fuse to the transmission/speedometer that could be shorting? A relay or module at the tranny?
Any help is appreciated as the truck is used daily, but is forced to sit right now.
Are you reading what you're quoting? You could have stopped right there - everything else you checked was moot. There's something drawing power off that circuit even when the 3 stock things are unplugged. It's either something that was added to that circuit, or it's a fault in the wiring.
