P500 Main 30 fuse blowing

[meshll]

My main 30 amp fuse will blow as soon as the key is the turned on. I have check several components, i can unplug the ECU, replace the fuse, plug the ECU back in and the will start and run fine. It will not shift into any gear? When you turn the unit off and try to restart the fuse will blow again.
I have a new battery installed and a new ECU on order. Has anyone had this similar issue, i was thinking ground but haven't found a issue.

 

[Admin]

 

[HondaTech]

Does the P500 have a large 5 pin connector on the ECM?

 

[meshll]

Does the P500 have a large 5 pin connector on the ECM?

I called it a ECM but i think the official name is PGM

 

[HondaTech]

The connector on the left, with the bigher flat pins is only wired to the shift motor.

Are you sure your blowing the main fuse and not the shift motor fuse?
If you unplug just that large pin connector, will the fuse blow? You may have a shorted shift motor.
If so, it couldve taken out the PCM, in which case the new PCM will suffer the same fate.

 

[meshll]

I will be home in a couple days, I will test your theory before installing the new PCM.

 

[Rtr]

Did you find your problem

 

[SILVER_ALERT]

Did you find your problem

Hey @Rtr, the guy that originally posted this problem has not been back on the forum since then. It's doubtful you will get a reply. If you have a similar problem, you might start a new thread. An introduction would be good too, since you just signed up.