Heater explanation

[marinaman]

Hi all
After much reading on the aux heat unit, can some kind soul inform me,  if you put the 12v direct to pin 1  should the heater start no matter what the outside temp and run a full 30 min cycle if engine cold

or, if temp above 5c would it start and run a few mins as it knows its too warm to do a full cycle.

Just trying to grasp the working system before i work on it, my old unit in the VW was an Eberspacher that simply fired when under 10c when the engine ran or if the temp sensor was bridged it would run at any outside temp by means of an on off switch.  i was trying to find if the X5 had this same sensor set up so it could be bridged and fool the heater.

[X5Sport]

Pin 1 will start it regardless.  It will however just run until either the battery or fuel state shut it down.  I don't think there is a time limit.

[marinaman]

Hi
have put on timed start this morning. it started up for min or so then stopped, after some routing round i find that there is no fuel coming up. I attached a wire to the pump pulse wire and applied 12v on off,  the pump is clicking but after 10 mins of on off at a decent speed still nothing comes out of the pipe.
Any suggestions,  apart from the pump, though if it were ticking i would have thought it working.