Let me start by saying I am extremely pleased with my new Rennline LED headlights. My visibility out in my country roads at night is a vast improvement from the stock headlights on my '84 Targa! I also think they look great, and my P-Car friends think so too. That said, what a royal PITA installing them! Rennline sent me a recent installation video that helped.
https://www.youtube.com/watch?v=Uj1SOnPPLMc
Here are a few other tips to help prepare you, and help shorten the frustrating installation problems:
1) you should plan on adjusting the direction of each lamps first. This needs to be done without the glass or trim ring, because you will need access to adjusting screws in the front. Additionally, if your projected light beams are not parallel to ground then you will have to rotate the lamp which may require you loosening the locking ring on the back of the light. WARNING - installing just the lamp without glass or trim ring will not give you the exact same position on the car as it will when the lamp fixture is installed with glass and trim ring. Why - the plastic lamp housing is not rigid enough to hold the same position when mounted to the car. The glass and trim ring provide the rigidity needed to form the proper shape to the car. This may result in a few attempts to adjust the head lights, mostly a vertical adjustment issue. IMPORTANT - while installing just the lamp housing you may find it nearly impossible to keep the plastic housing lip clipped over the car's metal ridge to hold the housing in place. I found that I needed to back off a couple turns on the installation screw at the bottom to keep the top plastic lip from popping off. My recommendation is that when it comes time to adjust the lights by projecting on a wall, get a friend to lend a hand. One person uses two hands to hold the lamp housing against the car, while the other person works the directional adjustment screws.
Once the lights have been adjusted, AND you have marked them left and right, the following install tips can be done on the bench:
2) getting the rubber trim around the glass lens is not easy, but is doable with large hands. Two people would make the job easier. You will wonder where the appropriate center is on the rubber trim. When in doubt, less rubber on the lens face is better, as you will understand when you install the trim ring. Work the rubber trim so that it is uniform around the entire glass lens.
3) installing glass lens in lamp housing needs to be perfect or you will have trouble installing the metal trim ring in the next step. After rubber trim is on glass, install the glass into the lamp housing, starting by push the top under the housing's lip and then pushing evenly around the glass until fully seated. Inspect through the glass to make sure it is fully seated around the entire lamp housing. This took me at least a half dozen attempts because the rubber trim ring would want to shift while installing the glass. You can tell if this happened if a section of the rubber on the glass is more pronounced in one area than the rest.
4) installing trim ring also requires precision to get it to fit as needed. When aligning the trim ring I suggest to focus your alignment on matching the raised screw hole section of the plastic housing to the raised screw hole section of the metal trim ring. Don't focus on the hole, but rather on the outside edges of the raised areas so the plastic housing has clearance on both sides. It is a very tight fit with no room for being off. Finally, if the metal trim ring doesn't want to seat around the glass, check to see if a section of the rubber trim seal is protruding under the metal trim ring. If so, go back to 2
Good luck!
