hi, i also have the same problem with u.
already asked them in this forum. But they seems does not have any idea on Diesel Ranger..lol...so, if u have the solution, do tell us.

My problem starts one morning and it suddenly cannot be start. Then I called my friend to look at it. He said that my glow plug is out. So i bought a new one. But since then, it still the same. I took my ranger to check, they said there is something wrong with the wiring and they took care of it and also they changed my main fuse (60A) dunno where they change.

But u said there is a clicking sound when u turned on the key, but i noticed that there is no clicking sound. could u tell me where is the heater relay? maybe it needs to change..

thanx