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Re: 1972 GMC Sierra c2500, electric
Your wire should run to a positive block on right fender. You must have a short. Wire diagram shows it going to high beam switch and headlight switch. Looks like it tees off to alternator too. Someone spliced in the red wire to the black with the flat fuse.
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1927 Willy's Knight 24,000 original miles, 1958 Impala 283/Powerglide, 1971 Monte Carlo 350/350, 1972 GMC K2500 350/350, 1976 Chev. K10 350/350, 2006 GMC Sierra 2500HD LBZ Duramax/Allison, 2006 Chev. Silverado K3500 LBZ Duramax/Allison
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