[88 YJ Total Power Loss When You Turn The Key]

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[88 YJ Total Power Loss When You Turn The Key]

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20200418_144611.jpg

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[88 YJ Total Power Loss When You Turn The Key]

Im working on my sons 88 YJ.  When you turn the key the dash lights come on and everthing looks good.  When you turn the key you hear a click and everything goes black.  You have to disconnect and then reconnect the battery to get anything back on in the dask.  We have replaced the starter, ignition switch,  locking cylynder, all 3 relays.  The back of the fuse box and the bulk head connectors look like they are melted, the metal pins are mostly gone.  So my questions are... What caused this and how do I fix it?  Any help would be great. Thanks