Grande Punto Blower not working on 1, but working on 2, 3 and 4.

[arun20988]

All of a sudden fan blower of my punto grande stopped working on no.1. it works fine on 2,3 and 4. I have checked resistor and connector of resistor. All seems fine but problem is as it is.

Kindly help.

 

[OliPottage]

Could be a problem with the motor, I had the same issue with my car and it looked as though it was the resistor, replaced the resistor and wiring loom as the cables were burnt but still didn’t fix the problem. In the end I replaced the motor which instantly sorted the problem, hope this helps

 

[Bernievarian]

How that works ?

The resistor block has 3 built-in résistors in order to drop the voltage that's delivered to the fan motor.

Position 0: motor NOT grounded
Position 1: motor grounded with 3 resistors in serie: high voltage drop, low speed
Position 2: motor grounded with 2 résistors in serie: mid voltage drop, mid speed
Position 3: motor grounded with one single resistor: low voltage drop, high speed
Position 4: motor directly grounded: no voltage drop, full speed ...

One can check the résistors block with an ohm-meter between pin 5 (output to motor) and the others; pin 4 is direct grounding (0 ohm) the others MUST show a resistance, you'll probably find that the 3rd one (for position 1) is open.

BRs, Bernie

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