If 85 is live and you earth 86 the relay should click at the very least. How are you running the neg to the 86 pin? Ideally just lift the relay enough to slide the wire in.

No click that u could hear and yes relay barely lifted and wire from negative terminal on battery , I'm not great at This stuff and I've no multimeter at the moment but whatever about 86 negative I think 30 is doing nothing and that should be live , no ? Please correct me if this is stupid but could current for 30 be going to 87 or would this make any difference at all ?

Check out that F6 fuse.

Pin 30 should be positive along with 85 OR 86

Thanks guys the type of driving I do I don't need the fan really right now but would be great to get it going , I'm still losing a bit of oil but that's for later ,by the way Italian job that ecu wiring breakdown very useful, at least puntos give you something to think about ......

Joe 130

For a couple of quid get a cheap mulitimeter it will serve you well, and with punto electrics you will need it.

Let me know how you get on and give me a shout if help is needed

Yes il be getting a multimeter and some form of diagnostic tool alright preferably one mainly for fiat and Alfa

Found the little fecker at last

So fan not coming on with temp sensor disconnected. Relay and fan all ok and runs by earthing the ecu earth pin on the relay.
Ecu is detecting the temp sensor disconnected , you can hear the idle changing.
Suspected no continuity between fan relay firing pin and ecu B8.
Dismantled fusebox but everything was clean and tight in the lower level of the box.
Pared back a little insulation on the grey wire at the ecu plug and found no continuity to the relay firing pin.
Started unwrapping the wires from the fusebox and where the harness goes over the top of the battery box there was a crushed and corroded grey wire.
So good to hear the fan cycling again.

Re: Found the little fecker at last

Brendan W said:

So fan not coming on with temp sensor disconnected. Relay and fan all ok and runs by earthing the ecu earth pin on the relay.
Ecu is detecting the temp sensor disconnected , you can hear the idle changing.
Suspected no continuity between fan relay firing pin and ecu B8.
Dismantled fusebox but everything was clean and tight in the lower level of the box.
Pared back a little insulation on the grey wire at the ecu plug and found no continuity to the relay firing pin.
Started unwrapping the wires from the fusebox and where the harness goes over the top of the battery box there was a crushed and corroded grey wire.
So good to hear the fan cycling again.

Click to expand...

pic?

Re: Found the little fecker at last

flisko said:

pic?

Click to expand...

Sorry, no pic. The wire was crushed flat and pulled apart in a puff of green/white corrosion powder.

Brendan W glad you got it fixed

Italian Job said:

Brendan W glad you got it fixed

Click to expand...

Thanks. The best bit is the silence. Been driving around with the heater full on and the windows open

Brendan I can understand your happiness now you can move on to other jobs knowing engine is safer well done

Inspired by Brendan's fix I unwrapped my wiring from fuse box to junction up to ecu and checked ecu downwards towards junction, no breaks to be seen , ah well at least I worked out how to open ecu plugs

Breaks can be tricky to find. It may only be a kink in the insulation with no break as such apparent. I have seen wires broken on the inside with no damage visible on the outside. Going back to post #22 . The bottom right pin on the relay is the ecu pin that fires the fan. Lift the relay a bit and run a wire from it to the battery negative - the fan should run.
This bit will need a second pair of hands. Remove a bit of the insulation from the grey wire close to the ecu plug. Start the car and disconnect the temp sensor plug. Now run the wire from the relay pin as before to the exposed part of the grey wire pushing firmly to get good contact.
If it runs the fan the problem is somewhere in that wire.

You read my mind Brendan next step is just replacing wire by wire starting with Gray wire , question though when you unlock the plug to right ecu side can you slide the wires out of that plug fitting like at the fuse box or is it a sealed job ? If sealed I'm thinking of snipping near ecu plug and soldering and sealing new wire and running to the fuse box , might just sort it , will keep at this fan until fixed , but then I'm looking At dealing with oil loss and occasional blue smoke when revved , think it's the gasket but could be worn Pistons may do compression test at some stage but rad fan first ,they seem to be a problem on puntos don't they ?

The pins in the ecu plug look like they will come out but I didn't want to mess with it as it looked healthy.