Did I fry my ECM

[Ficco87gn]

Installed turbo tweak chip today( motor hasn't been started yet). Everything seemed good. Ses light blinked once then sayed on, scan master came on and went into waiting mode. Turned the key on and off a couple times everything seemed good. Went to tuck ECM back into it spot and the orange power wire pulled out.i got the wire securely back into the plug and checked to make sure I had 12 volts to the pin connector but the ses light will not come on. The powers there but no ses light. I'm thinking I fried it. Can get my hands on another gn ECM but not till this weekend. Hoping it's something stupid. Any ideas?

[Steve Wood]

I would not think you would have fried anything but I guess anything is possible.

Look at this http://www.vortexbuicks-etc.com/ecmwiring.htm  and tell me which wire pulled out.

Also go here and follow the tree for no SES   http://www.vortexbuicks-etc.com/No_SES_chart_1.htm

[Ficco87gn]

C16 orange wire.
At first I had a hard time getting it back in, when I would plug into ECM it would push wire back out. I got it in and secure with 11.89 volts On the ECM side of plug.

[Steve Wood]

okay, if it stayed in the connector, it should be making contact...go thru the trouble shooting tree and see how that comes out.

Guess, you will have to try both legs of the tree because you don't know if the engine will run, or not?

did you try disconnecting the orange wire at the battery to see it that will reset it?  Don't see how that is different from unplugging the connector, but??

[Ficco87gn]

I disconnectted wire at battery.
I will start the trouble shooting tree when I get to the garage tomorrow.
Wish my garage was at my house.

[Scoobum]

Anything is possible. I unplugged the two sets of wires that plug into the ECM...without unhooking the orange ECM wire first...and fried the ECM.

[Ficco87gn]

I defiantly did that while trying to get a good connection on c16.
If I did fry it would that also ruin the new turbo tweak chip that was in it?

[Scoobum]

My TT chip was okay.

[Steve Wood]

damn, I never think about unplugging the memory wire before popping the connectors.... not sure why that could fry one, but, stuff happens

shop manual never mentions to unplug it before removing the connectors for testing as I recall??

[ULYCYC]

I've pulled the ecm, popped out chips and a host of other things with the key on and orange wire connected. Never fried a ecm. Maybe you got a bad TT chip, it happens. Put your old one back and try it.

[Ficco87gn]

Tried the old chip as soon as I had the issue. With the tt chip everything was working(SES light and scan master went in to waiting mode) until the wire pulled out now nothing even with stock chip

[Scoobum]

If you've got a spare ECM....swap 'er in.

[ULYCYC]

If one wire backed out of the ecm plug I would guess others may have. Pull all the plugs of of the ecm and tug on each wire and make sure they all are seated and no locks are broken.

[Ficco87gn]

Gonna go recheck everything I did last night and hope I was overlooking something. Can get a ECM to swap in but not till this weekend. Almost thinking about just buying one and putting it on the shelf if its not the issue

[Ficco87gn]

Crashed this car pretty good 9 years ago, ps headlight right back to the door. Did some damage to the harness and actually pulled the orange wire out. Had me scratching my head with the no start till I found that problem. I repaired the harness and have never had any issue in the 4 years I drove the car before doing the motor over. Hopin that it doesn't have anything to do with the repaires I made. Just puzzled with the fact everything was good till the wire pulled out