Blew ignition fuse car will not start - Sunfire Pontiac Cars & Trucks

a short in the ign system or ecm will need a meter to test both systems

Chances are, you either blew the IGNITION fuse, or the main FUSIBLE LINK under the hood (marked "fusible link").
Chances are you blew more than one fuse... let's hope you didn't fry the ECU!

You have a short somewhere in the starting and ignition systems. Take your car to an automotive electrical specialist immediately. If you put in a large enough fuse the car will start but you could trigger a fire that might destroy the car.

You have ONE Option ONLY

The thing you needed months ago

A WIRING DIAGRAM

Until you learn how to read a wiring diagram
& can logically figure out exactly the only thing
that could cause such a problem,you can't even
start any on vehicle examination or testing to correct
things

repeat

u have a dead short on main live wire check for overheated wires

I think there is a short in the system, possibly happened while replacing the main brain.

Hi, check the remainder of the fuse's chances are you have blown more than one fuse, if they are all ok then you may have blown one of the main fuse's which are located in a fuse box in the engine compartment.

I would guess that you either blew a main ignition fuse or the ignition switch melted.
The brake lights and starter don't use the ignition circuit.
You need to trace with a test light.
See if current comes out of ignition switch when you turn it on.
It has to be going into the switch for the starter to crank.
As to what blew the fuse, it could be a short in the backup light circuit?

well if the installation was done by a professional shop, then they are responsible to repair any problems stemming from there techs mistake. But it sounds like a lot of wires got fried before the fuse blew. I hope this helps please rate this thank you