My glow plugs keep throwing a service engine code. the dealership i bought it from wanted to replaced a relay for $250 OTD. I see the relays are around $120 but also seen i can get the whole control module for the same price. If i were to buy the module do you think it would come with the relays already in it? I know when it comes to electrical stuff , it can not be returned. it's a special order part and the description does not say. From what i hear the relays are in the module.
