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Today on our 2016 Jeep Wrangler Unlimited we're going to show you how to install the Roadmaster Brake-Lite Relay Kit for Towed Vehicles. Part number is RM-88400. This is what our brake light relay kit's going to look like. We've got our wiring harness here. Our relay is going to plug right into that. The relay acts as a switch that, in this case, is going to keep our brake light switch on our… see more >
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