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Hello, I have a 2002 Dodge Ram 2500 24v 5.9 with intermittent electrical issues. Sounds like fun - right? New PCM, rebuilt instrument cluster, paid so-called electronics experts to troubleshoot/repair, still have bus communication errors and half of the gauges (tach, oil pressure, H20 temp) do not currently work. Experts or I can fiddle/clean with various stuff and everything will work for a bit, but that nirvana is short lived - a few hundred miles at most. My latest exploration has found that the "power distribution block" (what are these blocks called?) in the under hood fuse box will not tighten as securely as I think it should... just as the 6mm bolt starts to pull up tight, it screws the available threads all the way through the "nut" that is captured in the lower block... so, the upper block can not be held tight to the lower. The upper block does seat fairly well to the lower, but the blocks move a bit relative to each other. I see three possibilities: 1) it's not a problem, i.e. it is working as designed, the designer of this block carefully constructed the these blocks so that it is not possible to over tighten it and I need to find some other "bad" connection to fiddle with 2) the captive "nut" in the lower block has pulled up due to over tightening 3) the engineer that design this block had no clue... Assuming that option 2 or 3 is correct, I thought I'd simply replace the screw that is captive in the upper block, but there is a very secure retaining washer buried an inch down in a tight space. My attempts to remove it have failed. - So, any thoughts as to which option listed above, if any, is correct? - Any suggestions for removing the retaining washer? - Do I just need to R&R these blocks with new? - Do you know if these blocks are available? Do you know the correct name for these blocks? Answers to these questions or suggestions to just move along and look for a bad connection or short... are appreciated. Thanks in advance, DH PS. the grounds appear to be good, they measure very little resistance.