Sorry that the previous answer was not helpful. If you have no power going to the DLC then that is what we need to trace. So the fact that you have no power to the main fuse box, I assume you are talking about the one under the hood.
That would make sense with this issue because that fuse box powers the starter, fuel pump, DLC (scan tool port), and the ECM itself.
So clearly we need to stay on that and find out why you have no power coming into this fuse box. That fuse box is wired directly from the battery. Please see the wiring diagram below. The third one shows the fuse box feed from the battery.
Just to confirm this is how you are checking for power, we need to make sure you have 12 volts on this stud pictured below.
Here is a guide that will help with checking the voltage if you need it:
https://www.2carpros.com/articles/how-to-check-wiring
If you have no voltage coming in here then we have a connection issue between this fuse box and the battery.
If you do have voltage on this stud but you do not have voltage on both sides of some of the fuses then you have an issue with the circuit board on the fuse box.
However, how did you check the battery to be at full charge? Did you load check the battery or just put your meter on it and see if it had 12 volts?
https://www.2carpros.com/articles/car-battery-load-test
It could be a battery issue even if it is showing close to 12 volts but I would suggest starting with ensuring you have 12 volts on the stud for the fuse box. If not, you may have a cable failure or the ground G109 for the fuse box which is on the left front shock tower. I know you said all grounds are fine but is the ground cable ok as well?
Let us know about this info and we can go from there. Thanks
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Wednesday, September 15th, 2021 AT 7:52 AM
