Jst2fst Posted April 14, 2012 Report Share Posted April 14, 2012 I'm having a hard time locating the temp switch on my cbr. I'm trying to put on an over ride switch for the fans and can't find the temp switch the only thing on my radiator is the fan no other wires. I thought I found it but not the right one. I'm looking over the wiring diagram and don't see it listed on the ones I have. All I see is the fan control relay and I don't wanna hook into it unless I have to. Quote Link to comment Share on other sites More sharing options...
2talltim Posted April 14, 2012 Report Share Posted April 14, 2012 is it #16 on here???http://www.mid-ohio.com/fiche_section_detail.asp?section=129238&category=MOTORCYCLES&make=HONDA&year=2003&fveh=3055 Quote Link to comment Share on other sites More sharing options...
Jst2fst Posted April 14, 2012 Author Report Share Posted April 14, 2012 That could be it I gotta check real quick. Quote Link to comment Share on other sites More sharing options...
TSB67 Posted April 14, 2012 Report Share Posted April 14, 2012 On the 07 there is no thermoswitch, the fan relay is ECU controlled. Quote Link to comment Share on other sites More sharing options...
Jst2fst Posted April 14, 2012 Author Report Share Posted April 14, 2012 On the 07 there is no thermoswitch, the fan relay is ECU controlled.Mines an '03 Quote Link to comment Share on other sites More sharing options...
2talltim Posted April 14, 2012 Report Share Posted April 14, 2012 is it #16 on here???http://www.mid-ohio.com/fiche_section_detail.asp?section=129238&category=MOTORCYCLES&make=HONDA&year=2003&fveh=3055that might be a temp sesor for your ecu not a fan switch Quote Link to comment Share on other sites More sharing options...
TSB67 Posted April 14, 2012 Report Share Posted April 14, 2012 Mines an '03But based on what you've found I'm guessing it's the same. Quote Link to comment Share on other sites More sharing options...
2talltim Posted April 14, 2012 Report Share Posted April 14, 2012 if it doesnt have a fan switch, you will have to run a seperate power or ground(which ever activates it) to the fan itself Quote Link to comment Share on other sites More sharing options...
Jst2fst Posted April 14, 2012 Author Report Share Posted April 14, 2012 But based on what you've found I'm guessing it's the same.Yea, I can see that nowif it doesnt have a fan switch, you will have to run a seperate power or ground(which ever activates it) to the fan itselfAh, hell.... That was a second option I had to do. I was thinking of running of off the battery with an inline fuse 10amp should do I think Quote Link to comment Share on other sites More sharing options...
2talltim Posted April 14, 2012 Report Share Posted April 14, 2012 Yea, I can see that nowAh, hell.... That was a second option I had to do. I was thinking of running of off the battery with an inline fuse 10amp should do I thinki would think 10 amp fuse and 16 gauge wire should be plenty. i you can follow it or find it, i would just find out what feeds the fan there should be a relay under the seat or near the fuse box and just splice into the realy accivation wire that comes from the ecu Quote Link to comment Share on other sites More sharing options...
QuikAccord Posted April 14, 2012 Report Share Posted April 14, 2012 Your ect (engine coolant temp) sensor comes off the engine to the ecu. Fan relay is controlled by the ecu. I would run 12v (through your switch) to the black/blue stripe wire coming off of the fan relay. Quote Link to comment Share on other sites More sharing options...
Jst2fst Posted April 14, 2012 Author Report Share Posted April 14, 2012 i would think 10 amp fuse and 16 gauge wire should be plenty. i you can follow it or find it, i would just find out what feeds the fan there should be a relay under the seat or near the fuse box and just splice into the realy accivation wire that comes from the ecuYea. I found the fan control relay behind the left fairing. Its a four prong relay I just gotta find the right wire to tie it into or just run a power line to the fan just gonna go with whats easiest to do. Quote Link to comment Share on other sites More sharing options...
QuikAccord Posted April 14, 2012 Report Share Posted April 14, 2012 black wire with the blue stripe on the relay is the positive wire to the fan. Quote Link to comment Share on other sites More sharing options...
Jst2fst Posted April 14, 2012 Author Report Share Posted April 14, 2012 Your ect (engine coolant temp) sensor comes off the engine to the ecu. Fan relay is controlled by the ecu. I would run 12v (through your switch) to the black/blue stripe wire coming off of the fan relay.Gotcha I just replied to your post on 600rr.net thanks for the info Quote Link to comment Share on other sites More sharing options...
hue jass Posted April 14, 2012 Report Share Posted April 14, 2012 I put an override on my FJR1300. Used a relay that fed the fan directly. If you're going to use the factory fan relay, you should put a diode on the signal wire coming from the ECU. You don't want to send battery power back through that.Running the fan takes a ton of juice. You're going to be using it in traffic when your generator isn't making any current. The bike gives fan when it needs it. You don't need any more. I never used mine. Quote Link to comment Share on other sites More sharing options...
QuikAccord Posted April 14, 2012 Report Share Posted April 14, 2012 I have a pdf shop manual you can download for your bike. pm me for link. Quote Link to comment Share on other sites More sharing options...
Jst2fst Posted April 14, 2012 Author Report Share Posted April 14, 2012 Sending PM now Quote Link to comment Share on other sites More sharing options...
TSB67 Posted April 14, 2012 Report Share Posted April 14, 2012 Yea, I can see that nowSorry for the delay man, I looked at the 03 manual and it's the same.edit - and now I see the 8 other posts between then and now. Quote Link to comment Share on other sites More sharing options...
Jst2fst Posted April 14, 2012 Author Report Share Posted April 14, 2012 Sorry for the delay man, I looked at the 03 manual and it's the same.edit - and now I see the 8 other posts between then and now.No, problem once it stop raining I can finish the switch Quote Link to comment Share on other sites More sharing options...
jporter12 Posted April 15, 2012 Report Share Posted April 15, 2012 You should run a wire to the control side of the relay, and let the relay do the higher current switching. The relay is probably controlled by a negative output from the ECU. You can run a negative (ground) wire to your switch, then from the switch to the relay. If I had a diagram or the bike, I could help you out with more specifics. Quote Link to comment Share on other sites More sharing options...
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