I dont know about the mystery wire, but I know the ground wire goes to a post behind the rear wall in the passenger compartment. If you take it off, you can see it back there. It is the best place in the car to get a ground for any kind of accessory you put in. Jim Reeve MNDMC - Minnesota DeLorean Club DMC-6960 <- Now running for those who have been talking with me! --- In dmcnews@xxxx, "J Rowe" <rowejj@xxxx> wrote: > 1. I think I have a problem with the ground wire that is under the coolant bottle. > Where in the world does the other end go? I pretty much lose it after it goes into > the firewall. How do you replace it since I don't know where the other end is. It may > be obvious and easy once I figure out the other end part.