I can't think of anything that would cause your symptoms without the heat being on. Could a surge cause the aux water pump to speed up and cause a hot spot under the dash? ( I guess only if you had monovalve issues too)

I put a fuse link at my aux water pump and a battery quick disconnect after I saw cphilips' car fire pics.

I think that causes a short in the CCU though. I don't think that would cause dash lights to flicker.

__________________
Chad
2013 Jeep Unlimited Rubicon
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

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1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
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1985 300CD - Gladys
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL