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Author Topic: 2 Speed heater  (Read 2382 times)

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mintex

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2 Speed heater
« on: April 30, 2015, 12:28:26 PM »
Hi all.
Anyone any one good with electrics please :)

The heater on our bis only works on one speed, when you push the switch away from you and i think that's the fastest one?
If i pull it towards me i get nothing.
Are the electrics on the fiat a switchable earth system? Is there an easy way to test if its the switch, blower of the wires in between please  :)
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Dave

dadandlad

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Re: 2 Speed heater
« Reply #1 on: April 30, 2015, 04:58:46 PM »
If you remove the switches, on the back of the switch you have three connections
MB supply from fuse
Z supply to fan motor 2nd speed
B supply to fan motor 1st speed

You obviously have a feed going in on MB
See if you have a feed coming out on B when switch operated if not it is your switch
If you have a feed you then need to check to see if you have a feed at the motor, if not you have a broken wire between switch and fan
If you have a feed at the motor it is probably the resistor that has gone

On my Bis there is a resistor mounted at the back of the front panel hidden by the spare wheel I have a sneaky feeling this could be the heater motor resistor, but only having it a few weeks I haven't had chance to investigate

Easy enough job to do but hard to describe but hope it helps
« Last Edit: April 30, 2015, 05:03:48 PM by dadandlad »
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Gadge

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Re: 2 Speed heater
« Reply #2 on: April 30, 2015, 06:55:01 PM »
I get its the switch. Mine fell apart inside so the contacts wouldn't touch
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mintex

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Re: 2 Speed heater
« Reply #3 on: April 30, 2015, 07:16:05 PM »
Ok thanks guys, i will look into it and post back the results  :good:
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Dave

mintex

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Re: 2 Speed heater
« Reply #4 on: April 30, 2015, 09:25:00 PM »
Cheers guys, its working now  :D

Turned out to be a bad connection on the fan motor :yahoo:
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Dave

andyzeetec

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Re: 2 Speed heater
« Reply #5 on: April 30, 2015, 10:08:53 PM »
The 3 spring thing is a resistor that controls the dip/main beam on your head lights.  :)

Quote from: dadandlad on April 30, 2015, 04:58:46 PM
If you remove the switches, on the back of the switch you have three connections
MB supply from fuse
Z supply to fan motor 2nd speed
B supply to fan motor 1st speed

You obviously have a feed going in on MB
See if you have a feed coming out on B when switch operated if not it is your switch
If you have a feed you then need to check to see if you have a feed at the motor, if not you have a broken wire between switch and fan
If you have a feed at the motor it is probably the resistor that has gone

On my Bis there is a resistor mounted at the back of the front panel hidden by the spare wheel I have a sneaky feeling this could be the heater motor resistor, but only having it a few weeks I haven't had chance to investigate

Easy enough job to do but hard to describe but hope it helps
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dadandlad

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Re: 2 Speed heater
« Reply #6 on: April 30, 2015, 10:17:27 PM »
Quote
The 3 spring thing is a resistor that controls the dip/main beam on your head lights.

Cheers  :)
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