Originally Posted by
Davey2Crazy
Alrite guy, is it the main relay and it does make the D4 light blink cuz that's exzactly what mine did. So don't tell me it doesnt, Thanks...
Do me a favor, find me one document (shop manual, etc) that stays the D4 light blinks when there is a problem with the main relay. The TCU handles the trouble codes for the transmission and it blinks the D4 light for transmission related issues.