I am diagnosing TPI issues: I have a question about testing the module. The test is to put a 12V power to the purple (refence) wire for the injectors at the distributor and when 12V is removed the NOID light should blink. Mine does blink, but VERY little. You can barely see the filament of the bulb turn red and then go away. Is this how it should work or should the bulb really flash. Sometimes when I accidentally touch the reference wire a couple times quickly the light flashes bright, but it is very dull if I only touch it once.