i have a 93 s10 blazer and my signal lights work when headlights are off, but iluminate but donot flash when headlights are on, and now if you turn them on, dash lights flash,brk lits stop all lits
when my head light are off my signal lites work, when they are on signal lites illuminate but do not flash, now when the signal lights r used all of the dash flashes, and if you hit the brakes, it stops the signal lights from working, and this all happened in the past couple days,
You have a bad ground at the park lights or battery. Could be broken or corroded.
I will check that out , thank you
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