I need to install a grid heater on my 99 Super Duty with a 12V swap in it. I am currently running a GHD, so if I don't plug in my block heater with this cold weather we have been having it will not start. I am not worried about having it come on automatically at a certain temperature, but rather just having it in general. I have no problem in turning it on manually if it is too complicated to set it as close to stock as possible. Do I still need to run it through a solenoid to kick it on or can I just run it to a toggle switch in the cab and turn it on manually when it is cold out and I know I need it? Any help or suggestions would be appreciated. Thanks :rockwoot: