Hate to tell you this, but electrical issues have a tendency to be this way. Usually really weird reasons for strange happenings that always make good stories to share with car guy friends.
On my previous restoration, an '80 Turbo Trans Am, the headlight/instrument panel fuse would always blow if I had the high beams on and stepped on the brake pedal. Took the car to an electrical system expert and he found some issue behind the fuse panel and fixed it for $80. Well worth it.
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
