are there any that have good fault find knowledge on these heaters? mine will not activate the fuel dose pump.. the pump is checked via direct 12Volt input.. the air intake pump/thing is working.. and the circulation pump is also activated... but for some reason the fuel pump is not...

via an ohm meter i have checked the thermal fuse and it reads aprox 2 ohm... i have not yet connected the cars heater blower

what could be wrong?