Hello I apologize for the translation but I do not know English I have jaguar xjs v12 1988 ECU was replaced with another by ebay Currently I do not have a spark on the lights There are 12v on the motors and switches Crankshaft sensor is a sturdy gasoline pump Works but I do not have a spark where is the problem thanks in advance

 

Go to the upper left corner of the home page, and click the Forums button, go to the Jaguar Models (Classic) scroll down to the XJS X27 and click on it. At the top of the sub categories you will find a thread on, "No start of an HE V12. Read and follow the instructions, and you will be able to fix the problem guaranteed. If it doesn't you missed something. Hope it helps.

Jack