Honestly, you would be amazed with what a bad ground can cause. Everything electrical on the vehicle needs a good ground. Since you are only getting a click, I have a feeling the ground is the problem or you have a bad starter.
However, if you find no problems with the ground or battery connections, I want you to check the starter itself. Here is a link that shows and explains how it is done. By doing this, we can determine if the problem is simply a bad starter.
The check engine light should turn on when you first turn the key to the on position and may shut off after a few seconds. If it does not, again, my first suspect is a bad ground. I can provide wiring schematics for the data link connector if you need them.
Let me know what you find. Again, make sure the ground wire to the engine block is clean, tight, and in good condition.
Saturday, November 24th, 2018 AT 3:34 PM