Leaving the lights on you need to move the wiring around and see if lights comes on. Pushing the wiring connectors together does it go on and off again. Also follow the wires to see if you have any nics that might be grounded out.
Thanks for the info. Can you pull the wiring harness out from the back to clip it on in the engine compartment. Also moving the wires around to see if you can get a broken connection to act up and inspect the wires. The receptacle might not be secure and in place when you connect the light unit. There may be some parts to remove to access the harness