Heater motor conundrum

[Mcalwell]

Hello Folks,

I'm new to this forum I've recently purchased a 2007 m59 Berlingo 1.9d, I'm nearing completion of puttin the dash back in after replacing the heater matrix and I'm having trouble getting power to the blower motor, I've checked the fuses etc, found fuse f22 blown but I don't think it has anything to do with the blower, replaced it others are ok, also checked the connections to the resistor and it's not getting any power either it may have been resolved in another thread but just thought I would ask, any help much appreciated. I've also come across a mystery plug which I don't know what it connects to if anyone can shed light on where it goes, it could be my problem, images should be below, many thanks again.

Matthew

[Sol]

Hi, the fuse layouts for the M59 attached, have a look.

(Last page are fuse designations)


  M59 PSF1.pdf (Size: 262.49 KB / Downloads: 10)


  M59 BSI1.pdf (Size: 168.6 KB / Downloads: 8)

[Mcalwell]

Hi, the fuse layouts for the M59 attached, have a look.

(Last page are fuse designations)

Hello,

I forgot to say I also checked the green connector at the side of the blower unit for power too found there's nothing going to it either.

I will have a look at the drawings/designations and let you know how I get on,


Thanks

[Mcalwell]

Hello again,

So I'm just wanting to check a couple of things,
From using the drawings kindly sent through by Sol I'm finding that I am getting no power at all at fuse f18 in the BSM, relay 3 controls this.

Am I right in saying those relays are soldered directly to the circuit board in the BSM unit?

Has anyone had to replace that specific relay before because there was no power to f18 or will I need to look at the signals coming from the ignition switch to activate the relay?

Many thanks

Matthew

[Sol]

The fuse (F18) in the engine bay fusebox (not the BSI) powers the contacts of the relay R3, which is in the engine bay fusebox bottom layer. It is not marked or identified.

Fuses always power relay contacts not the other way round except for main power relays, which would themselves be fed with a large fuse prior to the power relay itself.

I'll pull the diagrams of the fan circuit, but there is a main fuse (MF8 in the base of the fusebox under the top layer) prior to that one which may be blown, but it will also feed many other things so more things should be wrong. Horn, rear wash wipe, low speed cooling fan, etc. would all be down if MF8 is blown.

[Mcalwell]

All the other electrical items are working ok, I will double check the main fuses again tonight in case I've missed something silly

[Sol]

The usual fault in the fan not working (blower that is) is the resistor pack gets burned out inside. Have you swapped that yet?

[Mcalwell]

I haven't yet, no because the fan wasn't working on any speed at all.

I will order one any how just in case it is something as imple as that

[Mcalwell]

Oh and those main fuses checked ok

[Sol]

Yeah the first symptom is only one or two speeds work but then it fails completely. I've had to swap mine on more than one van. About £15 sees a new one and normally that's all it is. The power goes to the resistor first, then the motor and then to ground.