Fuse for cylinders 1-7 keeps blowing

Hi Dave,

Could you let me know what code you have? As far as a fuse, it could be ignition related, fuel related, injector related, and so on. So, I'm not sure exactly what is happening.

Let me know.

Joe

Okay, no problem. Can you tell me which fuse is blowing? If you look at pic 2, I highlighted two fuses. Pics 2 and 3 are a very small portion of the powertrain management. That is why I'm trying to narrow it down.

Interestingly, the injector fuses are hot at all times. Does the fuse blow as soon as you install a fuse or does the key need turned on?

If it blows as soon as it's plugged in, try disconnecting one injector at a time to see if there is one that prevents it from blowing.

Let me know.

Joe

Hi,

Okay, here is what I want you to do. I need you to first disconnect the battery negative terminal. Then, one at a time, disconnect one of the affected injectors at a time.

Each of the injectors receives 12v constantly when the battery is connected via the pink wire. What I need you to do is check for continuity to ground (resistance) in each pink wire for the 4 cylinders affected. I need to know if there is a short to ground.

When you check, place one lead of the multimeter (ohms) on a good ground under the hood and the other lead on the pink wire at the injector. There shouldn't be continuity to ground. If there is, then we have a short in the affected wire.

Afterthought... If you want, just pull the fuse that blows rather than disconnecting the battery. That will make it easier.

Let me know what you find.

Here are a couple of links you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Take care,

Joe

Hi,

You are very welcome. I'm glad you found the problem. Electrical issues can become a nightmare. My favorite was an ABS light stuck on (GMC Envoy). Everything tested perfectly.

Well, the A/C clutch pulley wore through and cut the signal wire to the inside of the vehicle. It took five minutes to fix the problem and 5 hours of diagnostics. Ugh! LOL

Regardless, please feel free to come back anytime in the future if you have questions. You are always welcome here.

Take good care of yourself,

Joe