Reversed polarity ignition coil?

2009 NISSAN ALTIMA
145,231 MILES • 2.5L • 4 CYL • 2WD • AUTOMATIC
Avatar
F IT FIX IT YOURSELF
  • MEMBER
  • 5 POSTS
Had my ignition coil harness rewired and now I'm getting reversed polarity when I try to jump the car. Doesn't start. If possible, please share an ignition system harness diagram.
Images (Click to enlarge)
Attached Media
Attached Media
Jul 14, 2025 at 5:21 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Yep, if you get the wiring wrong it will shut down the injector driver inside the PCM. Here is how the coil are supposed to be wired. Check out the images (below). Let us know if you need anything else.

Image (Click to enlarge)
Attached Media
Jul 14, 2025 at 8:20 AM
Avatar
F IT FIX IT YOURSELF
  • MEMBER
  • 5 POSTS
I tested to see if my starter was getting the correct voltage and the main power line is getting it's constant 12volts but the signal is getting - 12. What could be causing this?
Jul 14, 2025 at 2:41 PM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
This is a starter question, can you please start a new thread for it, we only handle one problem per question.
Jul 14, 2025 at 6:59 PM