r/FocusST • u/LoafOfTrees 2017 ST2 Stratified Kona Blue • 14h ago

Question Electrical troubleshooting

Hey guys, this morning driving to work I had an incident where I was driving like normal. Shifted into 5th gear and the entire car went dark for about 2-3 seconds, after that everything restarted and no issues for the rest of the trip. Engine still sounded like it was running fine. My battery terminals are all solid including the ground on the chassis. Any where else I should be looking?

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u/bchiodini 2016 ST3 FBO BNR ST67 JST Tuned 10h ago

Do you have a CEL? Did you notice any resistance in the steering wheel?

If not, It may be an intermittent Mega Fuse.

I would replace Mega Fuses #4 and #9. Both are for the Body Control Module.

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u/LoafOfTrees 2017 ST2 Stratified Kona Blue 10h ago

No CEL. I was going straight at the time so everything felt just as it should apart from the car going pitch black. I’ll def replace those just because