On my '69 they both look black, but it could just be age. They are easy to tell though as they are nearly equal length and terminate right by the throttle bracket.
My bad. I was thinking about the coolant sensor wire. The switch and it's wiring are shown on your site for '68's, Engine Compartment #2. The switched hot is black with a yellow stripe. I verified it on my '67.
I cut the plug off and spliced the black/yellow to the black so I could get 12 V power down to the Lokar switch.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
