jihwaan Posted December 12, 2010 Share Posted December 12, 2010 (edited) on the powerhouse racing site- they state you can wire these fans to "anything that gets power power when you start your Supra (alternator for example). No thermostat necessary! " Now which wire on the alternator has a positive 12v+ feed when the engine is running only? Can anyone tell me which wire I am looking for before I go probing around with a multimeter and probably burn my arm or something? Thanks for any help in advance guys... Edited December 12, 2010 by jihwaan (see edit history) Quote Link to comment Share on other sites More sharing options...
dude Posted December 12, 2010 Share Posted December 12, 2010 Do you mean engine running, ignition on on acc position?????? Quote Link to comment Share on other sites More sharing options...
jihwaan Posted December 12, 2010 Author Share Posted December 12, 2010 no - anytime the engine is running at all.. because if its running on the turbo timer I still want the fans running.. Quote Link to comment Share on other sites More sharing options...
dude Posted December 12, 2010 Share Posted December 12, 2010 Can you not take a feed from the live out of the turbo timer???? Or any ign live as the ign is live when the the TT is running. Quote Link to comment Share on other sites More sharing options...
jihwaan Posted December 12, 2010 Author Share Posted December 12, 2010 possibly yes this is what I will end up doing- but i was hoping there woudl be something in the engine bay I could just tap into- I currently have them running of a thermo switch / sensor but it seems to be playing up so after reading that on the PHR site I thought if I could just wire the +ve from the relays onto something that has power only when engine is running I could ditch the themro switch and itw oulod be fast and simp0le. Quote Link to comment Share on other sites More sharing options...
dude Posted December 12, 2010 Share Posted December 12, 2010 It should be simple enough to find an ignition live in the engine bay, after all the fuse box is in there. Quote Link to comment Share on other sites More sharing options...
jihwaan Posted December 12, 2010 Author Share Posted December 12, 2010 yeah cheers- I just thought someone might have known off hand but like you say it will be easy enough to find one- I guess I was just bein extra lazy... Quote Link to comment Share on other sites More sharing options...
dude Posted December 12, 2010 Share Posted December 12, 2010 I use the stock wires to power my fans, but I don't use a TT so I don't know if its suitable for your purpose. Quote Link to comment Share on other sites More sharing options...
jihwaan Posted December 13, 2010 Author Share Posted December 13, 2010 which stock wires? I have a feeling mine are no longer there as I have a 52mm aluminum radiator etc and the sensors may have been removed when tis was installed.. Quote Link to comment Share on other sites More sharing options...
monsween Posted December 13, 2010 Share Posted December 13, 2010 Turbo timer, or even the stereo ign +ve Quote Link to comment Share on other sites More sharing options...
jihwaan Posted December 13, 2010 Author Share Posted December 13, 2010 Turbo timer, or even the stereo ign +ve I need the positive feed even when the ignition barrel is physically turned off for when the turbo timer is running- I dont know how yours is wired up but when my car is running off the turbo timer the accessories and everything else is switched off- only the engine is running. Think Ill just go trolling around with a multimeter until I find what I need.. Quote Link to comment Share on other sites More sharing options...
Andy Blyth Posted December 13, 2010 Share Posted December 13, 2010 You could try using the "charge warning light" connection on the alternator. I believe it's pin 1 on the alternator connector, or pin 34 of the orange connector in the passenger footwell [Ref]. The wire will be at 12V whenever the engine is running. It's not a particularly "strong" signal. If you're lucky you might be able to drive an automotive relay. I'd recommend using a small signal relay in between the warning signal and your circuit. You can probably find something appropriate at Jaycar. Quote Link to comment Share on other sites More sharing options...
jihwaan Posted December 14, 2010 Author Share Posted December 14, 2010 You could try using the "charge warning light" connection on the alternator. I believe it's pin 1 on the alternator connector, or pin 34 of the orange connector in the passenger footwell [Ref]. The wire will be at 12V whenever the engine is running. It's not a particularly "strong" signal. If you're lucky you might be able to drive an automotive relay. I'd recommend using a small signal relay in between the warning signal and your circuit. You can probably find something appropriate at Jaycar. You sir are a gentleman and a scholar. I think I may firdst try using that to feed the relays- I think it should have sufficient signal if wired that close to the source- if not I will get a signal relay. I dont know why I didn't think of that myself. Thansk again Quote Link to comment Share on other sites More sharing options...
Andy Blyth Posted December 14, 2010 Share Posted December 14, 2010 You sir are a gentleman and a scholar. I think I may firdst try using that to feed the relays- I think it should have sufficient signal if wired that close to the source- if not I will get a signal relay. I dont know why I didn't think of that myself. Thansk again FWIW I found that the signal is enough to pull in a single standard automotive relay, but with the side effect of the charge warning light being very slightly illuminated. Only noticable in the dark. Quote Link to comment Share on other sites More sharing options...
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