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I have a new F-550 2008 and doing the wiring for Western Style bed. I have located the upfitter switches and noticed they were different colors than on the Sevice Bulletin for 2005. No problem, could figure out from sticker on wiring ends. What I can't locate is the 12 volt run circuit wire. On the SEIC service bulletin there is suppose to be a white/blue wire behind the diagonostic plug that provides 12 volts in run mode. Can't seem to locate anywhere. Does anyone know where it might be? The other connection I need is an instrument light feed. I have a 100 gallon diesel tank on the bed with a fuel gauge and need the light for the gauge. If any of you guys have access to the wiring schematics on a 2008, I would appreciate the help.... Helm says they are not available yet from Ford. Funny that the CD is which covers 2004-2008. Probably is it cost $2000.
Anyway appreciate any help...
thanks
Sure magnus1.. Here is some pictures of my bed I am building. Go to the bottom for pictures of the truck.. I ordered the Dark Blue Pearl Clearcoat. It is really nice in the sun....