Resistor / Temp Sensor ?

[Rom 0]

Almost ready to start after the respray. But the connector from one of these has broken off right at the terminal.

 

Theres 2 of the things im on about, i think there some sort of ballast resistor ? Or Air temp sensor or something ?

One sits below the NS headlamp, and is hard wired with 3 wires, then connects via a plug.

The other (which is snapped) sits down by the rad, and the plug goes straight into it. No hard wiring. Its a 3 pin plug, but only 2 wires, blue and white.

Just need to know which goes to which terminal on the unit ?

 

Cheers

[DrSarty 90 1 Cars]

Two things Romus:

 

1) The resistor is....a resistor. It's for the fan. Blue & white wires sounds right to me, and all it does is sit between the 3 pin socket plug which goes into the thermoswitch in the rad and the cooling fan. I'll explain.

 

The thermoswitch wires are ALL permament lives (so beware). One 'in' 12v perm comes from the battery direct or through the shunt box (distribution block) on the slam panel. Then inside the thermo switch is a sweeping contact which hits pin 2 at a certain water temp then pin 3 at a higher temp.

 

All it's doing is connecting that 'in' perm 12v feed to either pin 2 or 3 outputs, which are the positive feed wires for the fan. Only the wire coming off pin 2 goes via the resistor. Hey presto, the fan runs at slow speed until either the water temp cools and the thermoswitch breaks the contact, or the sweeper contact sends the 12v incoming on pin 1 shooting down pin 3 - which also goes to the positive feed on the fan, only this time directly, with no resistor in the way giving full rad fan speed.

 

'owzat!!! (?)

 

2) The 2 other threads you made you could close. Go bottom left, 'close topic'. Means all your answers/replies will be in one place. The forum's f*cking us all around at the mo.

Edited March 20, 2009 by DrSarty

[Rom 0]

Cheers Rich

 

Closed the other threads

 

You say about 3 pins... the resistor and plug has 3 pin, but only 2 wires ? Is this the one your on about ? As theres another which looks the same, but has 3 wires coming out of it.

 

WHat you say kind of makes sense...but if it only has 2 wires, connected to 2 pins..i dont get it ? As you mention it switches the feed in between pins...but surely if theres 2 wires, 1 feed in, 1 feed out...wheres the switching feed ?

 

Sorry if im being dense

[welshpug 1,657]

you're getting thee resistor confused with the thermoswitch, the thermoswitch has the 3 wires, 1 permanent live feed, 2 supply to the fan, one of which goes via the resistor.

 

 

the other resistor with the 3 wires and separate plug is for the dim dip function of the sidelights.

Edited March 20, 2009 by welshpug

[Rom 0]

Ahh ok. So the thermo swith is in the rad. Ignore the thing under the NS headlamp...

 

So does it matter which wires goes where on the resistor ? Im going to just have to use spades for now, so can swap them easy enough. I can see which 2 pins were connected, but cant tell which pin was white and which was blue.

 

I think the resitor should have the feed in from themoswitch on the outside pin, and feed out to the fan on the centre pin ?

So i can see if the thermo has a white or blue to the resitor, and connect it to the outer pin ?

 

Cheers

Edited March 20, 2009 by Rom

[DrSarty 90 1 Cars]

No. It doesn't matter with a resistor.