This was in the S2000

I need to get a fault code reader then I guess
But if the electrics re-set themselves I guess the code will be gone.

Any ideas why CEL and ABS lights though ?

 

Sounds like what happened when i knocked the ignition keys at a trackday. Engine lost power, power steering stopped, dash lights started to come on etc.

I had knocked the key enough to break the ignition circuit, but only momenterily and then it clicked back on again. But by this point the engine had stopped runnning.

 

That could be nasty if the steering lock came on!

 

Main relay failure is unusual on an S2000, but I suppose it's time they started. Affects most models eventually, notably 'Ludes & NSXs!

I'd suggest sparks at this stage. Like Veehex say, clean & tigthen battery terminals and get some contact cleaner & go through the whole bloody loom.

In fact, the 5G 'Ludes had a recall for dodgy ignition swiches self-offing (I had the same on a 127!) so there's any number of possibilities.

The trouble with electrickery is that is can be a bugger to trace and if it leaves you uncertain if/when it's gonna recur, it can get really tiresome.