Hi everyone

Last week I changed my heater core. When i put everything together, I started having problems with the interior and exterior lights. When I start my car and turn the headlights on, for some reason my dash lights go off. Vice versa when I turn off my headlights. my dash lights come on. Anybody has any ideas? It feels like I'm in the jungle at night, driving with no knowledge of my speed... Thanks

 

start checking all your harness's. sound like somthing has been pinched or left unplugged.