97 blazer turn on lights. Every once in a while just the headlights click off for a few seconds then come back on. Dash lights and running lights stay on just the front headlights will go off and on. Has happened a few times dealer has no idea they say they checked switch and seems to be fine. Need to tear into farther to try to figure out$$$$$$$$

Pull and clean your headlight grounds on the rad support... More than likely they're dirty/rusty and not connecting 100%

97 blazer turn on lights. Every once in a while just the headlights click off for a few seconds then come back on. Dash lights and running lights stay on just the front headlights will go off and on. Has happened a few times dealer has no idea they say they checked switch and seems to be fine. Need to tear into farther to try to figure out$$$$$$$$


Where is the rad support located for that??
Thanks

It's the entire portion of the front of your truck that holds the radiator in place and supports the side body of the truck (fenders, etc) You will see a black wire on either side coming from the harness screwed/bolted into the support.

have you changed the light bulbs recently?
it is a switch, where the thermo-fuse is