I forgot is it a 2 or 4 terminal ballast? if it's a 2 pin pull both sides off & see which one has fire when you turn the key on. The downstream side will be the other side. Good point but I wanted to confirm that everything is good & it WILL run but to speed things up trace upstream from the "point" on the ECU pentastar connector to find the open

live every 24 hour block of time like it's your last day on earth