We offer 4 Pole Harness # C59496 for your 1996 Cadillac Fleetwood Brougham Hearse. This hard-wire converter includes a circuit tester to assist you in identifying the vehicle wires to connect. This converter will safeguard itself and the tow vehicle against harmful electrical shorts and mis-wire situations. It will work with LED trailer lighting.
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We do indeed have an adapter that will convert a 4 or a 5-pole connector to a 7-way, part # 37185.
However, your travel trailer will likely have electric brakes, and to actuate them you'll need to install a brake controller like the Tekonsha Primus, part # TK90160. To install the controller, we offer an installation kit, part # ETBC7. The kit incudes everything needed to install a controller, including the 37185 adapter I mentioned above.
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