Won't start. HELP

[Ziggy91]

Hi guys like all you know now is carantine so my Leon just stays at home and battery wasn't great so 2 days ago I needed to go to the shop but battery was flat so decided to jump lead from another car and what heppend that I mixed up wires from another cars battery + I hooked on my - and from - to + and had so much sparks and now it won't start even with good battery no even dash lights come up I checked all fusses they are good. Please guys no judgement. Help me. By the way its Leon 2009 1.9 diesel

 

[Brimfull]

You may have fried the ECU

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[Ziggy91]

Do you know how to check it?
And is it expensive to buy other and fit?

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[Sharpy]

A garage may be able to tell you, what I do know is that a friend of mine put a battery in his Audi TT and connected the terminals up the wrong way round and it fried the ECU and some other parts as well. It wasnt worth fixing it and he ended up selling it for spares and repairs... Not a great situation to be in to be honest.

 

[R3k1355]

Check all the fuses first, you might have got lucky and just popped one.

 

[Legojon]

I checked all fusses they are good. Please guys no judgement. Help me. By the way its Leon 2009 1.9 diesel

My mate at college did this to a car 3 times in a row (getting himself a shock each time). We blew a fuse, but in the engine compartment next to the battery, not in the fuse panel on the side of the dash. Sorry, can't remember which one as we were panicking trying to fix it before the lecturer came back.