I bought a 02 chevy express cargo van a few months ago. my headlights blink on 2002 Chevrolet Express 2500

when in the off position. they stop blinking when i turn the headlights to the on position.How can i repair this problem.thanks in advance...

Asked by for the 2002 Chevrolet Express 2500
check for a loose ground or a bad switch
Thanks goodguy. I'll try it.