I'd like to think the fast flash letting you know the bulb is out is common car knowledge, I guess I was wrong lol. Might as well replace them all.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.