I believe those are commonly used to remove power from a TV set when the engine is running.
An observation: the label indicates that the coil is rated at 930 Mw at 12V - conventional nomenclature is that the uppercase letter "M" is used to indicate "Mega" while the lowercase "m" is used for "milli". So, taking this label at face value the coil seems to be rated for 930 megawatts - I don't think so!
Alan Hepburn - San Jose, Ca
2007 Bounder 35E being pushed by a 2020 Jeep Gladiator Sport S or a 2022 Jeep Wrangler Unlimited (JLU) Sport S