duragg Posted October 15, 2010 Share Posted October 15, 2010 Help, I am missing something stupid and can't figure it out. 1973 240Z Triples XR700 with optical trigger New battery New coil Ignition wires 3 years old. Car always ran good with Crane XR700 My brother had the car for a year and it developed a No Spark. I took it back and rewired the entire car (race car conversion basically - totally stripped). Still no spark. +12volts directly from a panel mounted toggle switch. Red wire from + of coil to Crane module gives +12 volts to Crane module. Yellow from Crane module to - of coil as depicted on wire diagrams for "flash" from optical pickup. Black from Crane module to ground. Test light from - of coil to ground flashes while cranking. Test light from + of coil to crane yellow wire (solo) flashes while cranking. I think this means the optical pickup is doing its thing. +12.6 volts at coil with Ignition switch on. When I connect the Crane Yellow and Red wires and depicted in the diagram the battery voltage droops to 10v. Coil gets HOT. Replaced coil, no change. WTF am I missing? Crane module bad even though it is "flashing" the coil properly? I find it odd that connecting the Crane module with engine off and ignition ON makes the coil SO HOT. And pulls the line voltage down so low. But maybe that is how they operate. Tj Quote Link to comment Share on other sites More sharing options...
duragg Posted October 16, 2010 Author Share Posted October 16, 2010 I tried 3 coils so far and can manually trigger the coil. Even thought the XR-700 module is flashing the - side of the coil it still must be toast. I added the ballast resistor and it just started smoking. Never f'd with those before, maybe that is normal for a new one. Will replace ignition wires again - though my high tension lead tester shows them good. Will also get a new XR-700 module. TJ Quote Link to comment Share on other sites More sharing options...
duragg Posted October 20, 2010 Author Share Posted October 20, 2010 Chassis ground. Ooops. But still no spark. However with a real chassis ground the XR700 positively tested bad. Ordered new XR3000 today (12 volt / no resistor system). Quote Link to comment Share on other sites More sharing options...
duragg Posted October 22, 2010 Author Share Posted October 22, 2010 All better now: Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.