So I today I finally got around to installing my new(used) ECU. I had previously put my battery in backwards which resulted in ruining my ECU.

I don't think it makes a difference, but I have a non working N333 which I replaced with a working N332.

Car started up, and I come to find my tachometer and my radio do not function at all. I've come to the conclusion that it's because of putting my battery in backwards from before.

My question is, how hard is it to fix these problems? These are the only things I have found that don't work.

Could the wiring be toasted or are both the radio and tach gone? Do I need to replace them with ones that work?

Thanks,
Jordan

 

both could be damaged from power being hooked up backwards, but I'd be checking blown fuses first

 

I read that I should check my trailing coil as well, as the tach is connected from the trailing coil. I'll check the main relay too.

Also, If my trailing coil is not working, could that result in my car having a little harder time starting and possibly flooding, since the trailing coil is putting out spark?

Thanks

 

yep on all that