Hi,
None of the wires going to the starter should be grounded. Do not do that.
As far as the starter goes, there will be a heavy gauge black wire direct from the battery. On the same terminal, there is a wire that sends battery voltage to the alternator. Then, there will be a smaller gauge purple wire.
If you look at pic 1 below, it shows the alternator and how it gets B+v from the starter. Do not ground that wire.
Next, try this before we proceed. See if it will start in neutral. Additionally, there are two fuses to check. In the under-hood fuse box, locate the 40-amp ignition switch 1 fuse. Confirm the fuse is good. Additionally, make sure it is getting power to and from it.
If it is good, check fuse 11 (5 amp) in the interior fuse box. Do the same. Check for power to and from it.
Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-a-car-fuse
If they are good, the next thing we need to do is this. You already know the heavy-gauge black wire has battery voltage all the time. The smaller purple wire will only receive 12v when the key is in the start position. When the key is in any other position, the purple wire will not have any power. Check to see if it is getting the power needed.
Let me know if you have questions, please let me know. Also, let me know what you find.
Take care,
Joe
See pics below. Pic 3 shows the interior fuse box and pics 4 and 5 show the under-hood electrical center #2 location and the fuse to check.
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Friday, June 24th, 2022 AT 10:41 PM