A6 C4 AEL No electric power at all

[Joop]

OMG during installing the trip computer it seems i killed my car.
I broke some parts off the ecu harness connector so the wires was not fit
in the best to the ecu... i plugged back the battery than try to start the car
for a few seconds the dashboard was lighting but after 5 sec its gone.
I turn back the key and tried to start again but nothing a happened now..

The batter is almost full,i checked the fuses but all of them are fine
but now there is no electric power in the car(no lights,no power windows etc)

Maybe i killed the ECU?Or what could happened?

What to do now??Please help me

[quattro-nick]

maybe wire on the battery loose?

[Joop]

that would be too simply.
As i said when i turned the key it was normal until 5 seconds and than
dissapeard and like a blowing bulb maybe i have shortcutted something.

It seem no power from the battery but not because it is empty

[Joop]

Yesterday i gave a try to load the battery a few seconds later the indicator light of
power windows buttons began illuminate. I turn the key to check if it is switch okey,
its seems its okey i let alone it for 10 minutes but the electric power dissapeard again.

The only thing i can hear is the realy when turn the key.

[RichLV]

I'd get a multimeter and start going over the main power wires. See where it gets lost.

[Joop]

one more important thing is that i can see the indicator of parking brake(really slightly)

[AndyP]

I seem to remember that there is a master power fuse ( 100a?? ) in there somewhere, maybe you've blown this. I'm sure UrS4boy will be along soon with a detailed answer!

[domas]

sounds like grounding issue

[Joop]

thank you all of your answers! Do you know what can happen if ECU disconnected under supply?

[prj]

Absolutely nothing.
If you have no power anywhere in the car incl. the power windows, horn, lights etc it has nothing to do with ECU, dash or anything else.

[Joop]

Absolutely nothing.
If you have no power anywhere in the car incl. the power windows, horn, lights etc it has nothing to do with ECU, dash or anything else.

well i would not say there is no power anywhere.I have checked a relay next to the ECU volt meter shows 12V and the parking brake lights is also illuminate

[Joop]

I seem to remember that there is a master power fuse ( 100a?? ) in there somewhere, maybe you've blown this. I'm sure UrS4boy will be along soon with a detailed answer!

Hello AndyP,

i was triing to locate this power fuse but haven't found any blown fuse even it by my left knee.

[Pauliusb2]

If You Will Need New Ecu I Got One.

[Pauliusb2]

I Have Wiring Too If You Need Pins Etc

[Joop]

If You Will Need New Ecu I Got One.

thank you for your offer hopefully the ecu is not dead