The LT is a separate turn signal system. I used the adapter ($20.00) from U-Haul and it worked fine on a home made four way trailer. I tried several others but thay did not work right because I had a Bushtec isolator already installed. I had to put a load resistor between the turn signal inputs to get the 4-way flashers to work right. But stop and turn all worked just fine. Many of the depend on the existing bulbs in the host vehicle to work properly.
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