mmgemini Posted February 6, 2006 Share Posted February 6, 2006 I'm fitting a Ford thermostatic fan switch to my 300Tdi for the Kenlowe fan. Now to save me having to wire from the inside of the car.I'm thinking of linking into the fuel pump solenoid wire to give a live feed to the thermostatic fan switch Does anybody see any problems with that ?? I eat rat poison mike I can cause trouble in an empty house !! Quote Link to comment Share on other sites More sharing options...
Lars L Posted February 6, 2006 Share Posted February 6, 2006 Yes, perhaps... As you may have noticed, "everything" is shut off the moment you engage glow plugs and starter in order to give them all there is to get. Not so with the fuel solenoid as it has to be open all the time. But, if it's going to create any problem is beyond me. Quote Link to comment Share on other sites More sharing options...
simonb Posted February 6, 2006 Share Posted February 6, 2006 Better way of doing it would be to take the feed from the cut off solenoid (which is live all the time the ign is on and also when engine cranks) and feed that to a relay coil. Then take a +ve feed from alternator +ve or even the battery and put that through the relay contacts and then on to the fan thermal switch. The thermal switch is what will turn the fan on and off. I doubt if the solenoid feed connections at "the other" end are up to the current of the fan. Solenoid won't draw more than an amp nornally, whereas fan could be 20-30a. Quote Link to comment Share on other sites More sharing options...
mmgemini Posted February 6, 2006 Author Share Posted February 6, 2006 Better way of doing it would be to take the feed from the cut off solenoid (which is live all the time the ign is on and also when engine cranks) and feed that to a relay coil. Then take a +ve feed from alternator +ve or even the battery and put that through the relay contacts and then on to the fan thermal switch. The thermal switch is what will turn the fan on and off. I doubt if the solenoid feed connections at "the other" end are up to the current of the fan. Solenoid won't draw more than an amp nornally, whereas fan could be 20-30a. Simon I'm thinking of going from the stop solenoid wire to the thermo switch.Thermo switch to relay. Sorry I should have mentione the relay.That's actually already fitted?? It was only the live ign wire to the solenoid I was sort of thinking can there be a problem. Really I'm trying not to have to put another wire through the bulkhead. LOL I eat rat poison mike I can cause trouble in an empty house Quote Link to comment Share on other sites More sharing options...
imspanners Posted February 6, 2006 Share Posted February 6, 2006 Should be alright to use the solenoid feed if your using a relay. The only thing I would suggest is uping the amp rating of the solenoid fuse by 5Amps or carry some spares just in case. Quote Link to comment Share on other sites More sharing options...
simonb Posted February 6, 2006 Share Posted February 6, 2006 yep either way will work, thermo switch contacts will last longer if u do it ur way as its only switching the relay rather than the full fan current it would normally. Relay will be cheaper to replace than thermo switch... Quote Link to comment Share on other sites More sharing options...
mmgemini Posted February 6, 2006 Author Share Posted February 6, 2006 Thanks everybody. Now let us hope for a fine couple of days I eat rat poison mike I can cause trouble in an empty house.i Quote Link to comment Share on other sites More sharing options...
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