Use an Ohm meter, make sure the power is off first. A broken wire will read 0 (zero), or infinity.
Normally the blinking on and off indicates there is a broken switch, broken wire, or a piece of bare wire. First, I would test the switches.
no it can not start with a broken spark plug wire unless you fix it
The Broken Wire - 1916 was released on: USA: 5 February 1916
The repair of a broken wire will depend on where the break is. If the wire cannot be replaced then it will have to be spliced together, preferably by soldering. The wire joint then needs to be sealed with a waterproof coating.
Broken Arrow - 1956 The Broken Wire 1-32 was released on: USA: 14 May 1957
A destructive test.
If there's a broken wire then the circuit is no longer closed. It's open.
No current will flow though a circuit which is broken.
An open neutral means the neutral wire is disconnected or broken. You will have to remove the outlet and find out which is the case. The wire may also be broken.
This is a broken wire in the driver side door. Remove the boot and you will see the broken wire. Spice wire and re-attached. All will work.
Could be a dead battery, broken starter, broken solonoid, or an electrical problem like a broken wire, or fuse.
You have a wiring problem. Check really close the small wire on the solenoid. This wire is located on the opposite side of the solenoid that the big wire going to the starter is on. These are usually found corroded and/or broken inside the jacket insulation. You can run a jumper wire to test or use a tester.