Diode mod for LED 3

I have brand new trailer lights. I had to replace the wiring harness due to an accident caused by the connector hooking over the hitch on the tow vehicle. After just wiring it all back together the lights would not work. I figured the wiring probably got stretched somewhere so just replaced it all. I got the new LED lights but the best I have been able to do so far is to get the middle LED in each signal light to come on. All the rest do not. Everything seems to work as it should with that little exception of it only being the one light.

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