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DVT873 · 01-22-2020, **(Subject: need new BCM? )**

Check the wiring at the starter where the battery cable attaches. It is used as a main junction point. You need to take the nut off to be sure everything is good. The ring terminals can rot. They will look good visually. Cleaning the threads off with a wire brush first will help with removal. Had one a where the volt gauge was going crazy including alarm and red light and the truck, used on short hauls was getting hard to start. Engine running voltage at the batts was 12.3 or so. At the alt it was about 14.6. Nut was loose on the starter. Alt output wire goes directly there and then to the batts. Ignition switch feed also comes from down there. Odd thing was there were no codes in Diamond Logic or Insite. Note, If anybody ever needs to replace any wires down there they are fusible links for about 6 to 8 inches up from the starter. Usually just the terminals. Could still be an Alt but with your other problems I would start there.