Thought this might amuse you.....
Testing the FBH I bought from eBay (didn't want to fit it and then find out it didn't work!):
- Holes cut in the bottom of a bucket, coolant hoses shoved through and silicone sealed
- Fuel pump cable tied to basket and fed from a fuel can
- Croc clips to battery
It heated the bucket of water in about 3 mins (faster than my kettle!!)
I can now say a few things for certain:
> Positive goes to pin-1 of the 2 pin connector
> Negative goes to pin-2 of the 2 pin connector
> Pin 6 of the 6-pin connector goes to the fuel pump (either terminal of the fuel pump, it doesn't matter which way around the pump's hooked up). Connect the other pin of the fuel pump to negative.
> Once it's all connected up, connect pin 1 of the 6 pin connector to the positive and hey-presto, the heater fires up! Disconnect it, and about 3 mins later the heater shuts down.
> Leave pin 3 disconnected, unless you want to run auto-heating.
I'm now off to figure out how to connect the thing into the coolant system.