R34 Battery Connected In Reverse

[OSH1FT]

Hey guys,

I was changing over my battery in my R34 GTT at night in very little light and managed to connect the terminals the wrong way around. Had a small spark and then nothing.

I Charged the other battery back up and put it back in the car, replaced a couple of blown fuses but now the car wont start. My remote locking which is powered by an immobilizer doesn't work at all and the only sign of life the car currently has is being able to flip the headlights on and off. Currently every fuse is good, and i've tried swapping the ECU over on the off chance it had been fried by the battery, but this has made no difference either.

Is this likely to be a problem caused by a dead immobilizer system? or is there another big master fuse somewhere that isn't in either the engine bay or foot well fuse boxes?

Cheers

[GTSBoy]

ECU may have decent protection against reverse polarity, but it's a reasonable bet that the immobiliser didn't.  Note the use of the past tense.

[OSH1FT]

Just now, GTSBoy said:

ECU may have decent protection against reverse polarity, but it's a reasonable bet that the immobiliser didn't.  Note the use of the past tense.

I'm fairly confident this is the issue too. Just wanted to check I hadn't missed another main fuse somewhere before I take it to a sparky to have it removed. The wiring is a jungle ?