need help bad!!!!!!!!!!

[mrmane901]

2009 g8 gt. problem started a couple a week. First airbag fault started flashing, then radio locked up say data mismatch. Shut car off no start security active. No dash lights. check all three fuse boxes and some grounds. Got new bcm today from white auto. same issue. i can push the car alittle and the dashlight pop on and then it was start. soon as i drive it some stuff repeat itself. my driveway is on a little hill start fine ever time in my drive. Flat surface no start sercuity active. NOW no dashlights blank dash nothing coming on but the radio and interior lights. but it starts and run in my driveway. Dont have dealership money. i dont know whats going on. somebody please help me out

[TailG8er]

Check the connectors at the BCM and ECM. Check for corrosion and bent pins.

Check all grounds.

Check trans selector, is it in park or neutral? Might need to adjust linkage.

Do you have a second key to try?

[BuildItYourSelf]

I was having similar issues. But mine had nothing with power. Check the 2 screws in the fuse box up front. Turn them until they click.
I even had to pull the top of the fuse box and push up in the connectors and turn the screws it gave me about another full turn on them then I had power through out all harnesses.
Its worth a try.

[mrmane901]

I was having similar issues. But mine had nothing with power. Check the 2 screws in the fuse box up front. Turn them until they click.
I even had to pull the top of the fuse box and push up in the connectors and turn the screws it gave me about another full turn on them then I had power through out all harnesses.
Its worth a try.

I check the screws. Do they suppose to be loose? I tried to tighten them.

[-Ray-]

It appears you have an intermittent electrical issue. Put the car in the position where it fails to start, or dash lights or other lights don't illuminate. Start moving the wiring harness. Use a volt meter to check voltage at battery, the feeds under the hood and at the fuse box. Check to make sure the connection at the ecm isn't loose.

[gr8lover]

i can push the car alittle and the dashlight pop on and then it was start. Do you mean physically push the whole car?.... does this happen every time you push or is it random?...

like others said need to check... unplug, reconnect connectors.... assure grounds are tight near fuse box and also on drivers side...,, many of those have come loose over time...

[mrmane901]

Do you mean physically push the whole car?.... does this happen every time you push or is it random?...

like others said need to check... unplug, reconnect connectors.... assure grounds are tight near fuse box and also on drivers side...,, many of those have come loose over time...

yes if physically push the car lights start off dim and i can start it runs and cut off. but if i hurry and put it in gear and take off it will stay running. like now it in driveway start everytime. i put it on the street security mode till i push it. i look it the grounds on the engine fender and under abs unit. i started have these problem when got my car back from the body shop to have the front bumper and radiator support fixed. Is there a ground around them areas i missing?

[BuildItYourSelf]

There's one that runs from the passenger side to the drivers side right behind the top of the rad support. It grounds at the battery terminal. Its an important ground point also. I don't remember what exactly grounds there but I know there was a few major points.
Wish I had my book to look.

[TailG8er]

Check the positive post on the drivers side of the engine, make sure it is tight.

[BuildItYourSelf]

Also check where that harness plugs in. Behind the pass headlight.

[TailG8er]

And try using better writing skills, it is hard to understand what you are saying.

[TailG8er]

How bad was it hit on the passenger side? Fuse box is there.

[mrmane901]

It wasn't hit bad. Somebody just ran into front of it. Cracked the support and front bumper. I pulled the car in the garage to check connectors and grounds. Got back in the car tried to start it security mode. Push the car back a little security went off car started. I just don't know whats going on.

[BuildItYourSelf]

Maybe a signal from the abs system can override secretly mode.
I wounder if the car is on jack stands and you turn the tires it will act the same...
The reason I'm thinking this is what if the car is going down the road and something triggers the secretly mode like a bad connection then it will override it so you can keep it going down the road.
I know it dont fix the problem but just a thought.