406 estate, heater blower just stopped this morning.

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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PeterN
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406 estate, heater blower just stopped this morning.

Post by PeterN » Thu Feb 01, 2018 6:23 pm

Completely dead, I suspect a fuse or as in the case of the XM the fuse holder self destructs, but I don't know where it is, probably under the bonnet but haven't looked - its cold out there. :frown:

Can anyone assist?

Thanks

Peter

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steve_earwig
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Re: 406 estate, heater blower just stopped this morning.

Post by steve_earwig » Thu Feb 01, 2018 7:18 pm

Sorry but I'm afraid you're going to have to remind me what flavour of 406 this one is :oops:
Talking bollocks sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - fuel leaks galore!
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - Can somebody stand by with an extinguisher?

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Doggy
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Re: 406 estate, heater blower just stopped this morning.

Post by Doggy » Fri Feb 02, 2018 12:19 am

Think Peter's is a fairly late model 110 HDi?

Usual fault is the blower speed controller giving you permanent full speed, changed mine last year.....

Fuses appear to be MF4 in the engine fusebox, then fuse 'F' on the side of the BSI, (assuming it's a full-mux D9).

My bro's old 1.9 D8 had a burnt up connector on the fan motor that responded to cleaning up/reseating
2003 HDi 2.2 6-speed Exec Estate

PeterN
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Re: 406 estate, heater blower just stopped this morning.

Post by PeterN » Fri Feb 02, 2018 11:46 am

Yes it is I believe a full MUX, it's an 01 reg but seems to have been made in 02?. 110 Hdi LX. Our other one is an 01 GLX but appears to be only semi MUX
I did make a reply with this info yesterday but the broadband failed just as I sent it. :x

Thanks Steve and Doggy I will just have to work my way through it checking the easiest things first. I had several XM fail and it was either the 30a fuse holder or the transistors in the regulator.

Peter

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Re: 406 estate, heater blower just stopped this morning.

Post by D9406 » Thu Feb 08, 2018 2:40 pm

I had this problem recently, turned out to be melted contacts in the ignition switch. Eventually it failed with the keys in, engine running and unable to turn engine off or turn keys to remove them.
Replaced switch with new unit from Ebay and blower working again. 99 hdi 110.
1999 406 HDi 2.0 110 GTX Estate. 48k when bought, now 126K. Second owner.
Clutch changed @110k, bottom pulley changed, cam belt changed, EGR blanked.

PeterN
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Re: 406 estate, heater blower just stopped this morning.

Post by PeterN » Fri Feb 09, 2018 11:52 am

Strangely the fault has disappeared for the present, I'm expecting it back any time though. I would think the most likely culprit is the power plug on the heater but have been to busy to look.

Peter

stevewalsh
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Re: 406 estate, heater blower just stopped this morning.

Post by stevewalsh » Fri Feb 09, 2018 1:36 pm

I had an intermittent blower on one of my 406's

Found it was the wiring from the back of the ignition switch,

If you drop the panel under the steering wheel and give them a wiggle you might find it starts and stops

dirtydirtydiesel
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Re: 406 estate, heater blower just stopped this morning.

Post by dirtydirtydiesel » Fri Feb 09, 2018 6:56 pm

Can be checked via pp2k, could be the resistor has died.
Quite a few have had it happen on the coupe forum.
There is some info in the 'how to' section :)
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

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GingerMagic
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Re: 406 estate, heater blower just stopped this morning.

Post by GingerMagic » Fri Feb 09, 2018 7:38 pm

I've said it before, there are only 3 usual suspects for a failed blower motor...
1 - Resistor under the passenger dash, a £20 eBay part but check the wires first as they sometimes melt...
2 - Ignition leads behind the barrel, also a £20 eBay part, can sometimes be diagnosed by wiggling the key in the ignition.
3 - Fuse.
The blower itself can fail but it's rare, as is a failed climate control unit, there is also an engine running relay which feeds the circuit, again I've not heard of one failing before.
Hope you sort it soon - it's getting blooming cold outside.
1999 T4 family wagon, slow as a turd but the kids like it
2002 Citroen Xsara Picasso Hdi90 - Dirtied by the kids, Dented by the wife....
Sadly sold the 406, best cars I have ever owned
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

PeterN
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Re: 406 estate, heater blower just stopped this morning.

Post by PeterN » Sat Feb 10, 2018 12:23 pm

Thanks Ginger

They were similar faults to the XM ones, the fuseholder in the under bonnet box was favourite, I have had to replace one of those with a 'floating' 30 amp fuse holder, that cured it. I have also had several transistors fail in the motor speed controller, in fact I have a repaired XM in in stock but I don't suppose its the same as the 406, never had the motor itself fail thought as you say.

Fortunately it was the spare car that failed my wife's is still OK, I can't be doing without a good heater. :frown:

Peter

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