Ozzy Posted January 6, 2006 Share Posted January 6, 2006 Why are people arguing about this? If someone wants to fit a fan switch, well that's their perogative. I'm glad I did, as I can just flick it on at will, particularly in the summer. This has the added benefit of the temp never getting to 92c or so, which is approx when the sender operates. I'd prefer my engine temp to stay around 80c, which I can now control. Chris has been extremely helpful in lots of areas, please don't pee him off! Keep up the good work Chris Oz. Still Shaking 6 speed 1600k Supersport Link to comment Share on other sites More sharing options...
Peter Carmichael Posted January 6, 2006 Share Posted January 6, 2006 There is space for a spare relay in the fusebox. I used existing unused low current wiring to get the relay signal from the Emerald ECU to the relay. The existing high current wiring from the fusebox still goes up front to the fan and is simply bridged over to the high current side of the relay. Job done. No extra connectors. No relays and extra wires ty-wrapped in the engine bay. Link to comment Share on other sites More sharing options...
Myles Posted January 6, 2006 Share Posted January 6, 2006 I use an override-switch and a relay - at the sharp-end where Chris W recommends it. Originally, I had the relay in the spare slot in the fuse box - but the fan *did* run noticeably slower with a long run of wire when compared to the speed it ran at when switched by the rad switch itself. Eventually, I moved the relay right next to the rad, and it seems happy - if rather ungainly. I'm not sure why people want to make sure their override-switch LEDs only light when the switch is flipped (as opposed to when the fan comes on due to the rad switch/Emerald) - I find it very useful as I can't hear the fan kick in with the hearing protection I use while aeroscreening. Project Scope-Creep is live... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
stephen grant Posted January 6, 2006 Author Share Posted January 6, 2006 That's what I'm trying to do Myles - have the LED light up when the fan kicks in, whether it's from the temp sensor or the switch. As I understand it, that's exactly what Chris's solution will do for me. stephen Edited by - stephen grant on 6 Jan 2006 21:52:47 Link to comment Share on other sites More sharing options...
Ozzy Posted January 6, 2006 Share Posted January 6, 2006 That's exactly how It'll work Stephen, if you follow Chris's drawing. The only downside, is that the led will glow when you're at speed. This is the fan spinning like a windmill, and acting like a generator. Nothing to worry about. Out of interest. Where are you placing your road angel? Looking at the car today, the only place where it seems to fit ok, is lower rh corner of windscreen. Only trouble is, because the bracket is plastic, and you can't bend it, it does point uphill a bit. If you have any better ideas, let me know. Oz. Still Shaking 6 speed 1600k Supersport Edited by - ozzy on 6 Jan 2006 22:15:06 Link to comment Share on other sites More sharing options...
Myles Posted January 7, 2006 Share Posted January 7, 2006 Road Angel? Who me? I've got/had an original RA - and I mounted that with a 7 windscreen (details on my site) - it was a lot easier with my aeroscreen though. I used 3M DualLock to anchor the plastic plate - worked fine, mostly. Project Scope-Creep is live... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
stephen grant Posted January 7, 2006 Author Share Posted January 7, 2006 Hi Ozzy, I've only tried it out in the tintop so far (it only arrived a couple of days ago). I need to wire up a 12v socket for the 7 before I can use it in there, and that's about item No. 3 on my endless list of things to do to the car this winter.... stephen Link to comment Share on other sites More sharing options...
nickdodo Posted January 8, 2006 Share Posted January 8, 2006 Hi – I think I owe Chris an apology. I was convinced that a relay was not needed but… I thought I’d just go and measure mine – voltage drop etc etc. Chris is right – If you want to do the job properly you need a relay in this circuit. There was a significant drop through the switched circuit and the Fan did not run as fast. I guess when I’d tested it out I’d not been so critical (or sloppy…). So now I’m going to fit a relay – somewhere down the front and have my switch energise the relay. Hey ho – we live and learn – guess that’s the wonder of Blat chat – thanks Chris. Nick Nick in the (1987) 1700 X Flow... Link to comment Share on other sites More sharing options...
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