I recruited my Dad's help to install the Espar D2 heater on Saturday. All the mechanical stuff was pretty straight forward, but the lack of wiring diagrams and labels made the electrical portion kind of a drag. I spent a good hour or so trying to figure out what all of the wires were for, only to find out in the end that you really only need a handful of them.
The fuel pump was obvious, but I did have to find a diagram of which wire was which when assembling the connector. This turned out to be the answer:
Next was the bundle of four wires where the large red & brown were obviously power/ground. I assumed the small red was power too, and after some googling was able to confirm that. I still have no idea what the fourth wire (red/white) does.. so its coiled neatly under the seat until I figure it out.
Next, I found
this blog post that stating that the brown/white & gray/red get bridged to bypass the external temp sensor. Can anyone confirm that?
When wiring the controller, I discovered that the Easy Start Timer only needs three wires: red, brown and blue/white. So I'm assuming the rest of that bundle is for the high altitude kit that I ordered with the heater, but Heatso failed to include in my shipment.
In any case, we were able to get the heater fired up after priming the pump. Now I'm excited to test it in the cold weather!