Do you have a Flashing Hold light as this indicates if you have an ECU error recorded, if its not flashing then unlikely to have an ECU error details of error codes and how to read them is shown here http://www.philmcfadden.co.uk/MazdaDiagnosticBox.htm

How strange, are you able to work out where it's leaking? Maybe some food colouring dye and a watering can?
Could you have a crack in the plastic surround perhaps?
There are instructions in the Service Manual on removing but it sounds like you have already done that.

Welcome aboard! Mumm, are you sure its leaking and not simply condensation ? Might be worth checking after before rain is due, and then after to see if its rain water, or maybe in the morning after its cooled down overnight and condensation has settled on the glass and then when you drive it runs to...

There is a lot of discussion on this matter! These links are to Steve Widdowson's work on the diesel engine and its problems; Basic fan operation www.igmaynard.co.uk/bongo/forum/viewtopic.php?f=3&t=48872 Cooling system diagram www.igmaynard.co.uk/bongo/forum/viewtopic.php?f=3&t=35902 coolant...

Presumably a diesel ? Did it get very hot ? Head gaskets don't normally fail but cracked heads is a common result.

In the "B" pillar is a yellow control module, this contains a dual relay (sealed type) and relevant circuit, diagrams available in the online diagrams if you use a browser capable of Flash; low quality screen grabs below;

Haven't seen any advertised in ages, I think quite a few people make up there own with custom brackets to fit the mountings in the AFT roof.

When I say inactive they both go to earth, so you can check for that, then one relay will pulse to provide power in the correct direction to open/close the lock.

The two recessed pins are for the lock, they only power up when locking is activated On/off otherwise there inactive.

If the electrical diagrams would help they are available but you need a Browser still capable of using Flash (UCBrowser & older versions see viewtopic.php?p=723668#p723668 ) http://www.g8dhe.net/bwm/bwmanualp.htm?1997/Page_110

I wouldn't unscrew them from the pillar/door it will just make alignment even more difficult. I've done it by measuring the voltages inside the door with the panel off. The other thing is give all the contacts a good clean with electrical cleaning fluid and a kitchen scouring pad (not metallic they ...

Have you been able to check circuit continuity between the "B" pillar contacts and the door contacts when the door is closed ? I've heard of a couple of doors where the hanging of the door had been "adjusted" incorrectly which meant that the contacts didn't meet correctly height ...

Just found this page but it only covers the Crankshaft pulley not the Cam shaft ..... nothing I can see relates to the Camshaft ...

Sounds good then! Do be aware that the silicon based plastic pipes are to be avoided, they need a different style of compression clamp, the existing black rubber pipes use the constant pressure clips which means that that as the metal pipes expand and shrink with temperature the rubber and clip expa...

Hope you don't expect to get across rough camping fields with them then! Seen a couple of undertrays ripped off because of that!