Ignition coil wiring diagram needed?

AFMCGOWEN

MEMBER
2008 TOYOTA HIGHLANDER
185,000 MILES

After replacing the coil and connectors the vehicle won't start wiring was done so possible error in wiring. Please provide wiring diagram. The vehicle was running prior to this repair now it turns over but appears to have no fire. The wires were spliced together and then the brittle broken connectors were replaced so it is possible the wires are not inserted in the proper location.

thank you

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Here is the ignition coil connector view and the coil wiring diagrams so you can double check the wiring. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.

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Monday, October 7th, 2024 AT 5:29 PM

AFMCGOWEN

MEMBER
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Okay, so, the wiring has been checked and corrected and same problem car turns over but doesn't seem to have spark. Coil #6 was stuck when it was removed the spark plug rubber was stuck around the opening, some of it has been removed but not all. Would this cause the spark plug to not seal well around that opening resulting in bad connection? Possible fuses/relays blown-we are checking related to detemine if one or more are blown. Can you offer any insight to further determine where the issue may be. The guy that originally started this process is no longer showing up to fix his mistake so I am uncertain what all has been done. I know he switched coil's since he removed & replaced one that was not showing as a problem. So he removed original coil #2 and put that coil in #6 and took the new coil and placed it in #2.

Unbelievable, unncessary mess. Appreciate any guidance

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Wednesday, October 9th, 2024 AT 1:10 PM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

In the wiring diagrams you can see the coil has power and ground for each coil, I would turn the key on and use this guide to check for both at each coil, this will tell you if the coils are just not getting signal.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Green and red for power, and wht/blk for grounds. Let me know.

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Thursday, October 10th, 2024 AT 11:44 AM