ELECTRODES & HARNESS H.V WB18X26980

Is the electrodes and harness part the one that hooks to each burner and plugs in to the side of the range? Brown wires with color coded plug in ends for each burner.

There are two burner electrodes that don't spark (the extra large burner and the small one-- both burners on the left side when facing the range). The other burner electrodes are working fine and the burners ignite when i turn them on (the oblong middle burner and the two burners to the right). Currently i have to use a match or lighter to ignite the two left burners. Given my description, what part or parts do you think needs to be replaced to fix this issue? (and, yes, i have carefully cleaned and inspected both burners.)

In the pack, are the four cables with the same size of electrodes but different colors the same and thus switchable? Thanks.