Can any one help me I have a Subaru 2L turbo on a 1998 and my mate tryed jumping it today and put the jump leads on the wrong way round now I have no ignition lights or alarm nothing work apart from the horn and hazards

check fuses, and use a spare battery as could have blown the one you had on it.

I've checked all fuses and there fine and I'll try battery to moz but don't think it's that as my horn and hazards work

do you see any voltage when checking with a multimeter on different places and if what's the voltage?