Originally Posted by Billyfinley79
Thank you. Sorry but where and what T are you talking about.
Coolant travels down two pipes.
The individual heaters are usually T'eed into those pipes at each location. It is possible that T's might not be used, but that would mean the heaters run cooler the further they are from the engine.
Whichever set up you have you can simply make sure that the return pipe is attached to the outlet of the last heater you want in the system, and that the inlet pipe joins directly to the same heater.
Everything past that point you can just remove.
There will also be individual wiring connections to each heater to control the fans (two-speed on mine), and another wire from a panel switch to the coolant pump.