Mercury Repair Questions? Ask a Mechanic for Answers ASAP
Hello and thank you for your question, The expert you had requested is not on line at the moment so I will help you with this, Sorry for the delay.If you are sure the new PCM and coil is not defective the the next step would be to Ohm check the drive circuit wiring from the coil to the PCM to be sure its not shorted to ground. The drive circuit on the #1 coil is the lite green/white wire from the coil to Pin #26 at the PCM. Check this circuit to make sure its not shorted. See the wiring diagram for reference in the link below, copy and paste the link to your browser to open and view it.https://dl.dropboxusercontent.com/u/104923897/coil%20%231%20Sept%207.pdfCheck this and post back if you have more questions and or need more help.
Well if you do not have a short to ground and or power in the circuit then I would suspect the new coil is just defective.