You guys rock. Gmcnorton, I used your technique (b/c I was having this problem, too). It ended up being a tach wire that the p/o had wired into an unswitched power connector in the fuse block. Sure did save me a lot of headaches!! Thanks again.
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I'm a little

and a lot
Ground beef: A cow with no legs.
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'66 Chevy SWB "Penny"
'67 Chevy Big Window SWB- aka
"Pearl"
'72 Burb- "Betty"
"It's not a hearse dammit"
'99 Chevy Ext. cab Silverado