Thermo fan bypass switch

[smith#29]

hey fellas, next thing ill be doing to my car is the 'thermo fan bypass switch' as seen in this thread https://forums.justcommodores.com.au/threads/how-fit-thermo-fan-bypass-switch.53659 and as i can see all i need to do is ground the blue wire with the white trace through it, is that right?

And as this thread is based on vn-vp, will it work for my vs or is the wiring different?

thanx

 

[Cheap6]

A VS works very similarly to VT with the BCM switching the low speed windings and the PCM the high speed. Try pin F6 at thed PCM, as per about half way down on page 1 of the How To. That will switch both windings = high speed.

If you only want low speed, you will have to figure out which pin it is on the BCM. In the absence of a wiring diagram, I would look for the wire colours at the fan relay under the bonnet and confirm by observing the voltage drop (D Volt meter), backprobing between the putative terminal and earth, as the low speed fan switches on. (Use the A/C switch to trigger the fan switching.)

 

[smith#29]

ok, so i tried earthing out pin f6 which is a blue/with white stripe and the fans didnt come on at all. so what am i doing wrong?

is that all that needs to be done, as in earth out that wire and they should work?

 

[Cheap6]

With the ignition on?

Yes, that should be all that is required.

 

[smith#29]

yes, with the ignition on, that should be the high speed fan but nothing goes. the fan comes on when the a/c is turned on so i know they are working.

 

[Cheap6]

Is there a five pin relay in the socket for the low fan speed?

Is the (high speed) relay "clicking" with the earth?

It is F6:

http://www.memcals.com/pdf/VSV6 Auto Wiring Diagram.pdf

You should be able to see that it is B3 or B14 (depending on BCM level) for the low speed if you want to try that instead.

 

[jeepster]

Is there a five pin relay in the socket for the low fan speed?

Is the (high speed) relay "clicking" with the earth?

It is F6:

http://www.memcals.com/pdf/VSV6 Auto Wiring Diagram.pdf

You should be able to see that it is B3 or B14 (depending on BCM level) for the low speed if you want to try that instead.

I think there is a mistake in this diagram: it shows the fan connected to the coil of one relay, and the relay contacts connecting the fusible link to earth.

 

[David Commode Door]

I've followed the published directions as well. Connected the blue/white wire to a switch with led and earthed to the body near the firewall.

The led in the switch comes on so there is power (and presumably earth) but the fan does not come on.

Ideas?