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paul mcgrath

Blower fan rheostat - which one?? 1986 Phase 1 1.6GTi

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paul mcgrath
Posted (edited)

HI,

 

I have an inop blower fan. If i apply 12 volts to the fan OR earth out the cream wire, the fan runs at 100%. I have therefore decided the resistor is the likely culprit.

 

My dilema is that the resistor has 5 pins yet the plug within my car only has 4 pins - center pin has no wires or terminal. The car has been within the family from brand new so i don't think it has been changed but it has been left at a friend of a friends garage for the last 18 yrs (and not driven) and i am wondering if it may have been 'swapped'. 

 

4 Pin resistors seem to be plentiful compared to 5 pin resistors but i don't want to buy a 5 pin if I need a 4 pin or visa versa. 

 

Just wondering if anybody knows if 5 pins were fitted to some cars even though the plugs were wired 4 pin (center pin unwired).

 

Many Thanks in advance

Edited by paul mcgrath

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dcc

You can repair your old item very easily.theresa guide on here :)

 

iirc its circa 50p and about 5mins

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Tom Fenton

The only difference is the 5 pin resistor card bypasses the resistive bit and so lets the fan run at full voltage. Base model 205's never got this, only GTI's, but maybe early ones didn't get it either. 4 or 5 pin will both work I reckon.

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paul mcgrath

The green wire mod looks the one for me. I have tried to open the sucker but it appears stuck solid.

 

Is there a knack to releasing the pcb from the plastic base?? 

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paul mcgrath

Hi All,

 

Just an update, my fan wasn’t working at all and i took the resistor in to one of the tech guys at work as I couldn’t open it. Long story short it would appear things have to be desoldered to release the circuit board within.

 

What he did at the same time was resolder all the connections and checked the transistor. He said it was knackered and was leaking heavily. 

 

Ordered new part as per the guide and also did the spring earth mod and it works a treat so thanks a lot guys. Cost me £7 for 2 transistors (can only buy 2 at a time) and i gave the lad a bottle of wine for his missus. I only wanted him to strip it down for me so i could try and fix it :).

 

Photos below of my repaired item

 

F1F8E541-81CB-4559-B1C4-908E439A46A7.jpeg

42F3666C-6C0E-4970-86F2-2E7DA14C682A.jpeg

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dcc

Good result :)

 

I tend to grab these from scrappers as they're getting thin on ground, generally speaking though all the 'faulty' ones I have seen were repairable

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paul mcgrath

Yeah im thinking i may get a 'spare' and also a spare fan!!

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Daxed

It really is a great little refurb, well worth the time, along with the motor clean & lubricate.

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