I was replacing the ballast on my headlight on a 52 plate Focus ST170 and dropped a spanner on the negative terminal and made quite a spark for about 3 seconds.

Since then the Brake warning light, traction control warning lights, and ABS warning lights have remained on.

I checked every single fuse in the bonnet and glove box and one was blown but was for something unrelated. All others were fine.

I have heard there are many inline fuses coming of the battery, but I dont really know where. Could one of these be the problem?

Or is it likely I have blown or shorted something and need to go to an auto electrician?

Thanks in advance.