To wire the glow plugs on a 5.9 Cummins engine, you typically connect each glow plug to a common bus bar, which is then linked to the positive terminal of the battery. The negative side of the glow plugs is grounded to the engine block. A glow plug relay or timer is used to control the current to the plugs, activated by the ignition switch. Always ensure proper connections and check for any damaged wires to maintain optimal performance.
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