Alright... so on my 2000 I recently installed the '03+ Projector style headlights and put an H7 (projector housing size) 4300k HID unit in. I wanted to have complete functionality of the current setup and make it as close to OEM on an '03+ that Toyota's switched grounds would allow me. I also wanted it to be as stealth as possible. You don't have to trim any frunk plastics, and you can't see any wires from inside of the cabin.
What you will need for this project: '03+ Headlight Housings, H7 HID Unit, H7 sockets, 9005 sockets, soldering iron, solder, flux, electrical tape, a couple small gromets, a 30A fuse (and housing), 10-15 feet of a ~12 gauge wire, numerous wrenches and sockets, etc. etc...
1. Take out old headlight housings. Search for more on that...
2. Cut the existing 9004 socket (current 3 prong) off.
3. Take the 12 gauge wire, hook the fuse up to it, and with an eyelet attach it to the battery. Drill a small hole into the firewall and fill with a gromet. Next snake the wire through all the rest of the interior parts. Drill another hole near where the steering column exits the interior (see pictures for reference). Again, fill with a gromet and snake the line.
Once inside of the frunk region, run the line to the drive side light. Around where the brake lines meet the firewall, T into the line with the same gauge of wire and run that to the passenger side.
This line is important as it is a constant source of power for the new H7 bulb. As of yet, no one has been able to find a constant source in the engine bay that can handle the amount of juice that the HIDs need to run.
4. New wiring socket info...
Driver Side (US):
9005 power - red
9005 ground - red/yellow
H7 power - fused power (line brought up from battery)
H7 ground - red/yellow
Passenger Side (US):
9005 power - red/blue
9005 ground - red/yellow
H7 power - fused power (line brought up from battery)
H7 ground - red/yellow
***note: the red/black and red/green wires no longer need to be used. Tape and cap them off
For those wires and sockets, be sure to spend the time and do them right; solder and tape them for the best connection possible.
5. Plug bulbs into new housing (9005 and H7). Your old 9004 bulbs serve no purpose anymore, sorry, get new bulbs.
6. If you are going to install HIDs, disable the daytime running lights as per the library. If you are not going to install HIDs, you are able to keep the DRLs. Reasoning being that daytime running lights are put on the low beam (H7) bulb with slightly less power than the HID systems need to be operated. This means that instead of having DRLs, the HIDs will flash once (which is horrible for HIDs) everytime DRLs try to engage. Disabling them (at your own risk) takes about 3 minutes...
7. Once you are sure that all of the wiring is correct, install you HID unit. It is very easy, plug and play. With the '03+ style, you have no worry about having to switch around the polarity as there is only two prongs; either the light works, or it doesn't (in which case you simple put the plug in the other way around).
It sounds really easy of course on screen, but it really wasn't. With wiring, Murphy's Law generally applies so be ready for it. Don't try to snake in the fused power by going through existing pathways, they are really tight to get into and you risk shedding the insulation on all of those tiny wires in the enginebay firewall; just drill a new small hole, there is no noise increase from doing so.
The HID unit - that I have - does not need to be grounded, so you can mount it to anything. The driver side, I found a beefy bolt and bolted down, and on the passenger side I zip'd it to a bunch of different things.
I did my whole install for $345 (not including cost of tools that I already had). A typical install would be in the $400-$450 range I'd think though; I was just patient.
Here are some pictures of the install for some visualization...
Giving credit where credit is due: Joe Schmoe for the wiring info, LT for HID install, my Father, and the people who I bought sick deals from.
This shows the fused line coming off from the battery
Gromet hole running from engine bay into driver side of storage plastics near the ECU
Fused line running into frunk area via near the steering column
This is the where the fused line comes into the frunk area
Fused line T point in frunk area
Passenger side wiring
Driver side wiring
Driver side HID mount
Completed install, you can't tell they aren't stock...
What you will need for this project: '03+ Headlight Housings, H7 HID Unit, H7 sockets, 9005 sockets, soldering iron, solder, flux, electrical tape, a couple small gromets, a 30A fuse (and housing), 10-15 feet of a ~12 gauge wire, numerous wrenches and sockets, etc. etc...
1. Take out old headlight housings. Search for more on that...
2. Cut the existing 9004 socket (current 3 prong) off.
3. Take the 12 gauge wire, hook the fuse up to it, and with an eyelet attach it to the battery. Drill a small hole into the firewall and fill with a gromet. Next snake the wire through all the rest of the interior parts. Drill another hole near where the steering column exits the interior (see pictures for reference). Again, fill with a gromet and snake the line.
Once inside of the frunk region, run the line to the drive side light. Around where the brake lines meet the firewall, T into the line with the same gauge of wire and run that to the passenger side.
This line is important as it is a constant source of power for the new H7 bulb. As of yet, no one has been able to find a constant source in the engine bay that can handle the amount of juice that the HIDs need to run.
4. New wiring socket info...
Driver Side (US):
9005 power - red
9005 ground - red/yellow
H7 power - fused power (line brought up from battery)
H7 ground - red/yellow
Passenger Side (US):
9005 power - red/blue
9005 ground - red/yellow
H7 power - fused power (line brought up from battery)
H7 ground - red/yellow
***note: the red/black and red/green wires no longer need to be used. Tape and cap them off
For those wires and sockets, be sure to spend the time and do them right; solder and tape them for the best connection possible.
5. Plug bulbs into new housing (9005 and H7). Your old 9004 bulbs serve no purpose anymore, sorry, get new bulbs.
6. If you are going to install HIDs, disable the daytime running lights as per the library. If you are not going to install HIDs, you are able to keep the DRLs. Reasoning being that daytime running lights are put on the low beam (H7) bulb with slightly less power than the HID systems need to be operated. This means that instead of having DRLs, the HIDs will flash once (which is horrible for HIDs) everytime DRLs try to engage. Disabling them (at your own risk) takes about 3 minutes...
7. Once you are sure that all of the wiring is correct, install you HID unit. It is very easy, plug and play. With the '03+ style, you have no worry about having to switch around the polarity as there is only two prongs; either the light works, or it doesn't (in which case you simple put the plug in the other way around).
It sounds really easy of course on screen, but it really wasn't. With wiring, Murphy's Law generally applies so be ready for it. Don't try to snake in the fused power by going through existing pathways, they are really tight to get into and you risk shedding the insulation on all of those tiny wires in the enginebay firewall; just drill a new small hole, there is no noise increase from doing so.
The HID unit - that I have - does not need to be grounded, so you can mount it to anything. The driver side, I found a beefy bolt and bolted down, and on the passenger side I zip'd it to a bunch of different things.
I did my whole install for $345 (not including cost of tools that I already had). A typical install would be in the $400-$450 range I'd think though; I was just patient.
Here are some pictures of the install for some visualization...
Giving credit where credit is due: Joe Schmoe for the wiring info, LT for HID install, my Father, and the people who I bought sick deals from.
This shows the fused line coming off from the battery
Gromet hole running from engine bay into driver side of storage plastics near the ECU
Fused line running into frunk area via near the steering column
This is the where the fused line comes into the frunk area
Fused line T point in frunk area
Passenger side wiring
Driver side wiring
Driver side HID mount
Completed install, you can't tell they aren't stock...