Igniter testing

[jez]

Is there a way of testing the igniter? I have gone through all the posts on forum but can't find any info. I have an electrical fault that keeps blowing the main 30amp fuse, have traced it back to the igniter. When I disconnect the igniter the fuse is ok, not sure if the fault is with the igniter or further on from the igniter. I have not got all the wiring connected as I'm working through it but have assumed if it's not connected it can't be causing the short. Hence why I need seem help. Sorry for all the questions on forum but can't find info any where else. Any help appreciated. 

[bwhittet]

Jez,
Hard to say where to start. A manual for your bike is the best bet. Not sure if it has any info on testing the igniter in them as i do not own a manual. I borrowed one from the library every time i need it.

Here is what info i have for 1985-87 EN450A & A1 US & Canada models
9 wires that go into/out the igniter
RED/YELLOW = 12v power supply from stop engine switch on RH controls
Green = coil
Brown = other coil
Yellow/black = ground
Yellow, Red/black, blue or purple (i forget), and White/black = Pick-up coil.
Brown/White = Diodes (looking for a ground so igniter will supply spark) (Ground is achieved through Saftey switches like neutral, kickstand, and clutch lever.)

Again i don't have a manual in front of me so i can't say if there is a testing process to the igniter. Sorry.
You are defiantly grounding out somehow and that is blowing your fuse. Without the whole harness stripped of the electrical tape protective wrap you won't see any bare wires that may cause this short. Don't remove the wrap till you isolate every thing and see exactly what is the problem circuit.

For the igniter I would suggest unplugging the pickup coil 4 contact plug, unplug the diodes (mine was a red box with 6pin conector - wires were three brown/white, yellow/green,green, black/gray wires), unplug the coils (green and black wires) and isolate them so they don't ground out. Now the only thing operating IN the ignitor is the 12 volt in (red/yellow) and the ground (yellow/black). turn on switch and see if it blows. If not then connect the diodes, then pickup coil, then coils one at a time. see which one causes a blown fuse.

I hope this might help.
Brian

[jez]

Hi Brian, thanks for your reply. I have a Haynes manual but have since found that I've got a en450 A1 1987, and the wiring colours are different. I have managed to download a US wiring diagram but it's not very clear. I have now removed all of the tape from the loom in order to trace wires easily which is how I got to the igniter being the problem (or when I disconnect that the fuse doesn't blow). I am quite sure that somewhere it is a dead short but have checked all the wiring and hence why I'm thinking it's the igniter. I'm going to try what you've suggested which sounds a good way to go. One thing I haven't found/checked is the pickup coil, is this inside the engine cover by the gear lever? Many thanks for your reply, fingers crossed.

[jez]

Thanks to all, I have found the problem, well the current one. So happy.

[xwindpilot]

What was the problem? Could help someone else!