I still have the single rear brake light and two add-on signal lights. I bought new rear lights and would like to merge them both into the new units.
I am ready to help, but want to be sure of these things,
1. How many lights on each side in the rear?
2. How many bulbs in each light?
3. How many filaments in each bulb?
4. What model turn signal switch do you have?
5. Is your truck 6V or 12V?
Does not matter which are original and which are new. That has me confused. I see Dave has the same difficulty as I do. Just need careful answers to 1, 2, 3, 4, 5
Pretty sure you DO NOT need the trailer converter at all.
We can talk about front turn lights after we get the rear straight. I'll be watching this post for your answer.