thanks for your reply! I have taken out the fuse box and gem. the terminals on fuse box are corroded a little bit i'am cleaning those. I have also sprayed "QD Electronic Cleaner" (produced by CRC) in the female connectors! Is this the most effective way of cleaning the connectors! I.E. would you suggest a better cleaner or is the one I have ok? Also I open the gem box and visibly there is no scorching or discoloring. Is it ok to open fuse box and could you tell by looking at it rather to replace or not? i.e. Looking for extensive corrosion?
Also I just found a fuse box off a 99 ford 250 super duty with 4x4 would that work on a 350 with 2wheel drive?