Well the cig lighter isn't a complex electronic item,
it's not polarity sensitive so could be it's wired wrong,
it should work wired up either way.
Other electrics not so much.
If the battery polarity is reversed it would most likely blow the ECU so the car wouldn't run at all.
So pull the lighter out and check the wiring.
Posted on Saturday 7th of July 2018Don't understand this? Ask a question