Mirror light wiring...
Well I'll try to answer the best I know how...
Relays
Let's see... I've done so much wiring that I can't exactly remember how many relays, but the general rule of thumb is to use a single relay for a pair of lights. Relays come with different current (amp) ratings, so as long as you don't exceed this, you will be fine.
In my case, I'm running a pair of 100W bulbs for the driving lights. So, for the two lights, this is 200W of power. The relay is good for about 20 amps I think, and it is fused at 15 amps throught the painless wiring fuse block I purchased to add on all accessories.
Since Voltage = Power / Currant:
The necessary voltage to power 200W at 15 amps is 13. 33 volts. This is cutting things a little close, but the truck's voltage regulates at about 15. 1 - 15. 3 volts at driving speed (after warmed up and grid heaters quit cycling... and subwoofer at a normal level :-laf). I'm by no means an electrical engineer, but just watch the ratings on your components, and you'll be fine. For any added electrical circuit, it is a very good idea to install fuses; moreover, anything over a few amps, and running a relay is beneficial as well.
Mirror Lights
All of the strip lighting I ordered from JC Whitney.
Take a look here...
VERSA-LITE RIGID STRIP LIGHT - JCWhitney SUV Parts
The light bars on the mirror are 3" and 6" versions in amber with black anodized channel.
Concerning wiring, the best option I saw is similar to the following...
Daniel Stern Lighting Consultancy and Supply
Since the light bars use single filament bulbs, you have to use a method of wiring similar to that above to achieve two different functions (assuming you want them to function as marker lamps as well as turn signals). The only downside (if you think of it as such), is that the mirror turn signals will flash exactly opposite the sequence of the OEM turnsignals. However, that may be even more effective at indicating your intentions to turn...
The factory Service Manual shows how the mirror glass can be removed easily to allow access to wire the lights. Additionally, there is a round plug that can be removed on the underside of the mirror arm to help phish the wires. If you pull the rubber boot back that protects the connector between the door and the door jam, you find several terminals in this block are unused. You can route the wires through here at your own discretion. I chose to pass the wires directly through this connector. I suppose if you see the need to be able to disconnect this plug, you could insert the appropriate terminals into the connector.
Hmmm, as for pictures of the bed lights and mirror lights on, I'll have to report back, as mine are not quite wired up yet! :-laf Between stereo wiring, new fuel pump system, lighting, extra fuse blocks, fueling boxes, gps, soldering in fuse blocks, relays, installing 10 gauges, Ravelco security system, etc, I've spent close to 200 hours just wiring... and I'm not done yet!
Hope this helps some, but feel free to ask questions!
--Eric
Merry CHRISTmas!!!