barneybrendan Posted June 22, 2010 Share Posted June 22, 2010 (edited) do i need 2 relays or can both fans be wired into one.Also what size fuse do i need. just done a diagram,does this seem right. Edited June 22, 2010 by barneybrendan (see edit history) Quote Link to comment Share on other sites More sharing options...
Guest any4any Posted June 22, 2010 Share Posted June 22, 2010 2 relays is better for fan speed fused size is 20A Quote Link to comment Share on other sites More sharing options...
barneybrendan Posted June 22, 2010 Author Share Posted June 22, 2010 2 relays is better for fan speed fused size is 20A cheers Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted June 22, 2010 Share Posted June 22, 2010 I would recommend two separate relays with individual fuses, but i would run at least 40 amp for each as most fans on start up draw a lot of current, i have seen fans blown 30 amp fuses before now. Quote Link to comment Share on other sites More sharing options...
paul mac Posted June 22, 2010 Share Posted June 22, 2010 I would recommend two separate relays with individual fuses, but i would run at least 40 amp for each as most fans on start up draw a lot of current, i have seen fans blown 30 amp fuses before now. if you can fit everything in i would also fit another stat and stagger the switching point, i found a really sexy dual point controller for this a while back when i looked, i'll have a look tonight when i get home if your interested (it wasn't the old HKS one you could get) Quote Link to comment Share on other sites More sharing options...
barneybrendan Posted June 22, 2010 Author Share Posted June 22, 2010 if you can fit everything in i would also fit another stat and stagger the switching point, i found a really sexy dual point controller for this a while back when i looked, i'll have a look tonight when i get home if your interested (it wasn't the old HKS one you could get) if you could im open for options on this,. Quote Link to comment Share on other sites More sharing options...
paul mac Posted June 22, 2010 Share Posted June 22, 2010 the one i looked at was a Dif controller which looks good value http://www.phase2motortrend.com/difdufanco.html the dif web site at the moment says its closed for maintenance, i also found spal do one now as well http://www.spal-usa.com/fans/automated/accessories/fanpwmV3.html Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted June 22, 2010 Share Posted June 22, 2010 The cheap option to run dual switching points would be find your two different temp thermostats and then weld two bungs to fit in a short section of pipe to fit in the rad hose;) Quote Link to comment Share on other sites More sharing options...
Kev.O Posted June 22, 2010 Share Posted June 22, 2010 Only thing is, you've got 86 on the left relay as the positive, with 85 being ground, and 85 on the right relay being positive and 86 being ground. Quote Link to comment Share on other sites More sharing options...
barneybrendan Posted June 22, 2010 Author Share Posted June 22, 2010 its fitted as per diagram now. if i turn the dial right down then they both turn on. i like the idea of the electronic controller,that is on the upgrade list once ive had the car mapped and saved a fiew more pennies. Quote Link to comment Share on other sites More sharing options...
TransitVanMan Posted June 22, 2010 Share Posted June 22, 2010 seperate fuses is a better idea as with single fuse if 1 motor goes it takes the supply to both fans - seperate fuses you still have 1 working hth Quote Link to comment Share on other sites More sharing options...
barneybrendan Posted June 22, 2010 Author Share Posted June 22, 2010 seperate fuses is a better idea as with single fuse if 1 motor goes it takes the supply to both fans - seperate fuses you still have 1 working hth i am going to do that but wanted to get it wired up today. Quote Link to comment Share on other sites More sharing options...
Rinus Posted June 24, 2010 Share Posted June 24, 2010 Sorry to interrupt, but isn't it possible to wire both fans into one, and connect them to the little fan wiring... I changed the temp sensor for a avensis one, same plug but 90-85 degrees, instead of 98-93... This is what i've done to my car and will start it up one of these days... I'm totally not an electrician, do I need to put in stronger fuse? Quote Link to comment Share on other sites More sharing options...
Terminator Posted June 25, 2010 Share Posted June 25, 2010 The standard wiring is fine for the trigger side of the relay, the power side needs to have wiring thick enough to take the max current+ head room. the fuse/s (really should be two) need to be below the rating of the wire you use. Where possible always take direct from the battery, when you are adding item with a big current draw. Just upping the rating of the fuse is really asking for trouble, the wire will cook and cause expensive loom damage if the fuse is no longer the weakest point in the circuit. If in doubt over compensate with heavier gauge wire on earth and feeds. Quote Link to comment Share on other sites More sharing options...
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