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The T4X has added Blue and Black/White wires for the use of a KeepAlive device. This decoder may be hard-wired or plugged directly into any locomotive with a 9-pin JST plug. The T4X may be used in locomotives which have ditch lights in addition to forward and reverse headlights.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.