[Turbomania]

Our alternators have built in regulators that can go bad separately. If the regulator is bad and no fuse is in line, it can allow more than standard voltage to be transfered down the hot wire and into the top of battery fuse and circuit box and can fry this and many other electrical components. It takes much longer than 5 minutes to properly check out an alternator along with the battery. Make sure this main wire is properly sized and is well connected to the high amperage fuse which protects everything. I think it is a 150 AMP fusible link type fuse available at any auto parts store. From what you have said here in your thread, it sounds like it very well could be your alternator/battery connection that is at fault. If the battery turns out to be bad too, replace it with the battery spec'd for the Diesel engine model. It's larger with more cold cranking amps and will fit into the original battery box. Don't allow the battery blanket to be discarded, re-install it for good over all hot and cold weather performance! JK