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Old 02-11-15, 08:15 AM   #1
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Default Blower Heater Peugeot 406 HDI Rapier 2002

Hello,

The blower heater in my 406 is not working.

There are two plugs in the control module, one for power and one with four wires leaving it. One positive, one negative, one where voltage changes dependent on the switch position and I am not sure what the fourth one does?

The blower works when taking power direct to it.
The wire which reacts to voltage from the switch increases and decreases when you move the switch so the fan module is working? and there is power leaving the control module as there is 14 volts at the blower plug.

So what the hell is stopping the blower from running?

I did notice voltage on the negative wire leaving the control module which is about 5 volts when unplugged from the blower, (and this goes up and down with the switch also) but this becomes 14volts on the negative when the blower plug is connected to the blower. Not sure if this is correct.

So could it still be the control module or something else?

I got a second hand control module but the connections on this are green and mine are black and the plugs do not fit. I checked the parts and they look the exact same bar the plugs. I looked at two hdis and both had green plugs and online they are all green. Cannot seem to locate a black one. However, I assume you can rearrange the wires and use the green plugs and the new module?

I attempted this but still no joy. I suspect it is not the module but something else telling the fan not to run.


Can anyone please assist?


Thanks

Barry
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Old 02-11-15, 11:47 AM   #2
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Hi Barry - the next thing to check would be the ignition barrel as these can wear out, maybe give the keys a wiggle to see if the fan comes to life..?

Also, there is an 'engine running relay' which basically only powers the fan when the engine is running - depending on 406 model this could be in the engine bay fuse box ( there are two black relays in there ) or somewhere else....
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Old 02-11-15, 01:38 PM   #3
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Default Blower Heater Peugeot 406 HDI Rapier 2002

thanks for that.

I had omitted the ignition barrell and any relay issues as there seems to be 14.4 volts with engine running at the blower plug.

Could they still be effecting the blower running?
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Old 02-11-15, 03:22 PM   #4
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Hi
Might be resistor..
Try a search on this forum for 406 resistor....
regs
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406 2.0 HDI (110), 2001
306 Roland Garros , 1999
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Old 02-11-15, 05:15 PM   #5
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is the resistor not the fan control module?

also, now when the car starts the lights come on. Just started today. I am beginning to suspect something else is afoot

when the car is off the light will come on when switched on and operate as expected. When you turn the car on the dip lights come on but are switched off. After that, with the car on, the sides and dips operate as expected when swithhed on. ie. when the car is turned on the dips come with the lights switched off, switch the sides on and the sides come on, switch the dips on and the dips comes on.

Also when you turn the indicator on and hit the brake and release it, the indicator starts flashing faster and the brake light and reverse lights will start flashing, alternating with the indicator, the the indicator goes back to normal.

Also the central locking had a mind of its own last week and was switching itself on and off with indicatirs flashing all the time. This has stopped and now it will not work at all.

Up to now I decided that the central locking and the blower were separate issues but now after this evenings carry on, there seems to a be an electrical fault that is effecting all of these things.

Any help greatly appreciated. thanks

Barry
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Old 02-11-15, 05:20 PM   #6
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could a bad earth do all of these?
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