Club126UK

Fiat 126 Chat => Fiat 126 Mechanical Problem Solving => Topic started by: mintex on April 30, 2015, 12:28:26 PM

Title: 2 Speed heater
Post by: mintex 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  :)

Title: Re: 2 Speed heater
Post by: 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

Title: Re: 2 Speed heater
Post by: Gadge on April 30, 2015, 06:55:01 PM

I get its the switch. Mine fell apart inside so the contacts wouldn't touch

Title: Re: 2 Speed heater
Post by: mintex on April 30, 2015, 07:16:05 PM

Ok thanks guys, i will look into it and post back the results  :good:

Title: Re: 2 Speed heater
Post by: mintex 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:

Title: Re: 2 Speed heater
Post by: andyzeetec 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

Title: Re: 2 Speed heater
Post by: dadandlad 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  :)