I keep getting PMs from other ranger-forums members asking about my LED conversion because they want to do a similar conversion in thiner truck. So I figured I'd be a nice guy and start a post to show people what to do.
The first thing you need is an Electronic Flasher. This fixes the "help I put LED's in my turnsignals and now they blink fast" problem. I bought mine on vleds, it was 16$ - people tell me you can get them cheaper elsewhere.
Headlights - On my 2004, there are 3157 bulbs in the turnsignals.
These are the bulbs I recommend - they are 50$ per pair at vleds.com, and have 60 SMT led's on them. From experience I can tell you that these will look about 90% as bright as the stock bulbs.
Corners - On my 2004, there are peanut bulbs in the turnsignals.
These are the bulbs I recommend. They are 9$ at vleds.com. These bulbs worked really well on my corners as I have black-internal corners (no chrome inside) and the light shines out very good with the dispersers. This was the biggest surprise of my LED job.
Reverse Lights - Every bulb in my tail lights was either a 3156 or 3157.
I used a similar bulb to the one I am going to recommend for my reverse lights, but this is because I did not know as much as I do now. I recommend these:
55$ a pair, 60 LED's each (same bulb as turn signals, but different color)
Brake/Turnsignals - If you want brighter than stock Brake/Turnsignals then you NEED to do an L1224R conversion. When an L1224R bulb is used in a reflector socket like a 3157 it is extremely bright, much brighter than even a stock incandescent 3157 bulb. These are the bulbs that manufacturers (like mercury) are using to make their stock tail lights LED (like the mercury mountaineer) - To get your hands on these bulbs you will need to purchase a set of mountaineer tail lights, and take out the bulbs - I'm sure you are saying "why not just buy the bulbs"? Right - well think about it. The L1224R's will not 'screw' into the socket of a 3157 opening. You need to cut out the opening (with a dremel) of the mountaineer tail lights, and then epoxy it to your stock lights so the key shape that it screws into can be adapted. This is much easier than it sounds, provided you buy good epoxy and LET IT DRY before you try and play with it. When I did mine I was trying to fit the bulbs in when the epoxy was still soft and this just made my life worse. One tip is to also make sure that the bulbs have room to turn so you can lock them in. It would be stupid to epoxy the key's in position where they will interfere with the rest of the light housing.
If you refuse to listen to me on this and still want to go with plugin's for your tails then a far second I would suggest the same bulbs as shown above for the front turnsignals and reverse lights, but in red. These are 50$ per pair. If you are interested in an L1224R conversion please email me as I have done this for other ranger-forums members before and the results speak for themselves. Not to mention the cost is basically the same as going with the plugins.
For the license plate I recommend these bulbs, also at Vleds.
They are cheap (10$) and work well, even know they will be offset at about 45 degree's from optimum position. I have tried 3 different kinds of bulbs back here and these ones to my surprise worked the best of that I could find.
For the center 3rd brake light I would recommend first making a board with multiple LED's rather than going with a plugin, but if you insist on using a plugin (and your truck is newer like mine, 2004) than you can take advantage of the fact that Ford eliminated the rear cargo lighting.
In the newer Rangers, there is a bulb socket spot for the cargo bulbs, but there are no bulbs or sockets in there. You can easily get yourself extra sockets and wire them in parallel with the rear stop bulb to make it 3 times better (do not try this with an incandescent bulb, it will draw too much current) - I do not really condone this method as I am currently in the process of making extremely bright LED boards that will go up in there.
I hope this helps some of you LED guys as I plan to update this thread with more info as I get questions so it can do everyone good. It would be useful if a mod made this a sticky.