Yellow wire is your ignition wire.
Chances are there is no polarity. An ignition coil is simply a wound of wires used to generate high voltage. But you may find a marking on it such as a "+" or a red wire wich would indicate the positive electrode.
purple is the trigger wire for the starter. Yellow is the ignition wire.
The ignition wire that run to the cap is red. The one that to the key ignition is blue.
To wire an ignition barrel in the Citroen Saxo, begin by disconnecting the wire at the negative terminal of the battery. A lead wire has to go to the ACC terminal on the ignition barrel. The starter relay wire goes to the ST terminal and the ignition wire is connected to the IGN terminal.
i had the problem with my 97 f150, the power wire to the computer had melted on the manifold and had to be replaced, check the wire to see if its grounding out
what about the ignition switch wiring
on a toyota corolla 1995 with a 1.6 or 1.8 liter the spark wire layout is 1342
The ignition wire in a Nissan 350z is black and red. The starter wire is white/red and the second starter wire is white/green.
The 1996 Toyota Camry ignition harness has three wires. The red wire is the hot wire. The black wire is the ground wire. The white wire is the auxiliary wire.
The 1999 Jeep Cherokee ignition coil used a black wire for the negative wire. The negative wire should be on the left post.
The remote wire on the factory radio in a 2005 F150 Ford Supercrew is usually blue. The remote wire is used to connect extra things to a radio that are not already factory installed.