oldrx Posted April 28, 2016 Share Posted April 28, 2016 I cant find a wire that is 12V while cranking and ign on key position to trigger coil relay. Can I wind two wires together (I have a cranking wire and an ‘on’ wire) to create one wire that does both to trigger? Or will this back feed or some shit? Quote Link to comment Share on other sites More sharing options...
tortron Posted April 28, 2016 Share Posted April 28, 2016 whats the car Quote Link to comment Share on other sites More sharing options...
chris r Posted April 28, 2016 Share Posted April 28, 2016 It will back feed. You could try a diode from the crank wire to the relay. Have you double checked all the fuses? Has there been any other wiring work done? Quote Link to comment Share on other sites More sharing options...
oldrx Posted April 28, 2016 Author Share Posted April 28, 2016 whats the car RX2 It will back feed. You could try a diode from the crank wire to the relay. Have you double checked all the fuses? Has there been any other wiring work done? I did blow some fuses but have replaced. Yeah i've been doing a bit of wiring, im an amateur though. Installed 4 new relays (fuel pump, fan, currently 1 x ign coil cranking, 1 x ign on for coil to get around this issue) My ignitors (rx7 elec dizzy) tested bad so im going to a 3 ignitor set up so i can run coil on plug wasted spark on leading plugs. Would like to simplify relays by having just one trigger wire and one ign relay. And oil press gauge (Podi brand) needs 12v when cranking & running too or apparently it breaks it. The factory ign relay is removed, dont know if this would affect it. I think it was just to bypass ballast resistors. Quote Link to comment Share on other sites More sharing options...
tortron Posted April 29, 2016 Share Posted April 29, 2016 connect to the hot wire to the starter solenoid, or from the alternator always live when key is on or cranking Quote Link to comment Share on other sites More sharing options...
oldrx Posted April 29, 2016 Author Share Posted April 29, 2016 connect to the hot wire to the starter solenoid, or from the alternator always live when key is on or cranking But will it turn off with key? Quote Link to comment Share on other sites More sharing options...
tortron Posted April 29, 2016 Share Posted April 29, 2016 yes, the wire comes from the key (theres two of them actually that do) Quote Link to comment Share on other sites More sharing options...
oldrx Posted April 29, 2016 Author Share Posted April 29, 2016 Will test that tonight, couldnt find one that was always live, must try harder Quote Link to comment Share on other sites More sharing options...
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