I have a 2003 civic ex. The brake light on the dash stays on(i have tested the switch and check fluid both were good) My key in chime and headlight chime and door chime do not work. The dome light doesn’t come on when door is opened. I checked the switches. intermittent wipers dont work. The ac doesn’t work either. Ive read tons online and in forums and everything comes back to the multiplex control unit. Any help would be appreciated!