Unfortunately I’m not gonna be at the boat for a couple of days and I did forget to take pictures. However my auxiliary pump is installed on the feed side of the heater coil. This means that it pushes water into the coil. Unlike water pump which needs to be on the return side from heat exchanger.

As for the Wiring, there is a plug on the V drive side of the block with the label heater only.
I had to take that apart and use the male female connectors and pins one and two. If you test it with the meter you will see that even with the ignition on and the engine not running there’s no voltage but as soon as engine is running there is 14 V DC on pins one and two.


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