If your not getting an alarm, then you likely have a bad ignition trigger coil up under the flywheel, as that is what 2 and 5 has in common, is a trigger.
What you want to do is disconnect all of the wires that run up to under the flywheel. And you want to measure the resistance between the trigger coils. The wiring pairs are as following. Measure Between...
Between Brown Trigger Lead and Yellow Trigger Lead
Between White Trigger Lead and Red Trigger Lead
Between Purple Trigger Lead and Blue Trigger Lead
All pairs should measure roughly 1100 to 1400 ohms, anything way over, or way under, or no reading means a bad trigger.
Also, measure between each wire individually to ground. All wires should be open with no path/resistance to ground. Any hint of resistance to ground means a bad trigger as well.
That is where you stand with this one, and what needs to be checked. Obviously I am not there to do this work for you. But I do want to make sure you are happy with me and the answers I give you here before doing the rating. If you have a further question on this, by all means feel free to fire away. If not, please let me know if the ratings box gives you any troubles.
Thanks in advance, and good luck!