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Originally Posted by atcNick
My stepbrother had a nissan tow hitch installed on his titan and they also installed what looked like two relays (not really sure). They're blue and they're inserted in the box right behind the battery.. I think they were labeled "tow trailer one" and "tow trailer two". He was asking me what these are for....anyone know?
Nick
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At least one of them is for trailer brakes.
Steve