I have problem with my front wiper (only rear wiper works), headlights stays on but doesn't work when i turn the switch, fog lights is off, AC compressor not coming on, and rear defogger doesn't work. According to the image i attached, i know the problem is between the BCM and the ECM but i don't know for sure which is causing all these troubles. Please i need assistance, i don't wanna waste cash on another part when one of mine may not be the culprit.