hello i have two heat element in my fridge norcold n841 3-way is ok only to replace the 110 v one i don't use the 12 v i use the propane when i travel last trip the fridge stop working on power so i use the propane and it work fine so i took out the elements one had black wires on it i think that the 110 v one and the other had yellow wires i think that the 12 v one i check them with a meter the 110v read 33 and the 12v one read 0 so them both are bad money is tight right know only want to replace the 110 v one what do you guys think