I installed my new Supertones yesterday on my 2002, and figured I would post a write up since I had to ask a whole lot of people to get some really simple answers. I used the stock horn locations for the lack of a second place to mount the other one behind the grill. I also put the lower pitched (300hz) in the front, behind the grill.
You can wire these two ways: with or without the supplied relay. Wiring them without the relay is a fine option. The horns are really loud just on the stock power. All you need to do is cut the single pin connector off of the old horn wire, strip it down a little, solder/connect it to either of the terminals on the Hella, and connect the other terminal to a good ground via another wire. On the stock horns, there is only a positive power wire because the ground is connected through the mounting bracket. Using the supplied relay to wire these is the way I chose to go, because I have heard both relayed and unrelayed Hellas and there is a pretty big difference. I figured I would do it right since I'm taking the time to do it at all.
The relay:
There are 5 pins on the bottom. This is the info I used to wire it properly.
#30 to battery (20a fused)
#86 to ground
#85 to wire coming from original horn
#87 to red wire of Hellas
Do not use #87a
The two red wires are power. I hooked up the green wire to the old horn wires to be the on/off switches. Black just went to ground.
Here is the fuse. I just went ahead and used a spare 20a fuse from my fusebox, soldered the power wire to the terminals, and wrapped it in electrical tape. My shrink wrap was too small to fit around the fuse.
Here you can see where the other red power wire and the green switch wire are routed, along with the fused red power wire going into the positive terminal of my battery. Subaru has all these convenient little holes, perfect for routing the wire and using zip ties to mount them!
Here is the in-depth picture of the first horn. You can see the red power wire. It goes to one of the terminals on the Hella and I soldered it on. Then I cut another length of red power wire, stripped it, and soldered it to the same terminal, in order to run it to the second Hella. The green switch wire is the same way. At the bottom of the picture, you can see it spliced in with the original horn wire. If you look closely, you can see a black ground wire coming from the rear of the Hella's mounting bracket, connected to the other Hella terminal, and then to the screw for ground. Almost all the connections are shrink wrapped, if not electrical taped, and all the wires are zip tied out of the way. Nothing touches the radiator or the horns.
Here is just a pic of the wire routing. Again with those great Subaru holes...perfect for running little zip ties to hold the wires! You can see the wires just go to the side of the radiator and back into the engine compartment.
This picture was taken from the rear. You can see the wires coming in from the radiator, and the green switch wire again connects to the original horn wire and the red power wire goes to one of the Hella's terminals. The other terminal gets a short black ground wire to the screw. You can also see that the Hella is mounted on the rear of the mounting tab. Although this is the stock location of my second horn, the Hella is too big to fit angled over behind the headlight, so I improvised in order to keep it on this mounting tab. This is the higher pitched (500hz) Hella mounted here. Again all connections shrink wrapped or electrical taped.
Front view, just the one horn showing here. Sorry about the mismatched grill and the bent hood. Both are salvage parts that I haven't really gotten around to properly repairing yet.
All in all the project took me about 3 hours to complete. I know it sounds like a lot, but I really really took my time in order to make good solder connections, shrink wrap everything, and route the wiring like I felt satisfied with. The horns worked the very first try, and sound fantastic. They are kind of higher pitched horns, but are crazy loud. Inside my closed garage they are even worse. Money well spent to get rid of the wimpy Japanese horn.
I picked these up here --> and using the code QUICK5, got them to my door super fast for $46.93 total., the cheapest price I've ever seen these for.
Anyway, this was my first official write up. Sorry for the stupid dirty engine bay and whatnot. I need to detail my car before my trip to Cali...let me know if I need to add anything or take some more specific pictures/instructions.
Erich
You can wire these two ways: with or without the supplied relay. Wiring them without the relay is a fine option. The horns are really loud just on the stock power. All you need to do is cut the single pin connector off of the old horn wire, strip it down a little, solder/connect it to either of the terminals on the Hella, and connect the other terminal to a good ground via another wire. On the stock horns, there is only a positive power wire because the ground is connected through the mounting bracket. Using the supplied relay to wire these is the way I chose to go, because I have heard both relayed and unrelayed Hellas and there is a pretty big difference. I figured I would do it right since I'm taking the time to do it at all.
The relay:
There are 5 pins on the bottom. This is the info I used to wire it properly.
#30 to battery (20a fused)
#86 to ground
#85 to wire coming from original horn
#87 to red wire of Hellas
Do not use #87a
The two red wires are power. I hooked up the green wire to the old horn wires to be the on/off switches. Black just went to ground.
Here is the fuse. I just went ahead and used a spare 20a fuse from my fusebox, soldered the power wire to the terminals, and wrapped it in electrical tape. My shrink wrap was too small to fit around the fuse.
Here you can see where the other red power wire and the green switch wire are routed, along with the fused red power wire going into the positive terminal of my battery. Subaru has all these convenient little holes, perfect for routing the wire and using zip ties to mount them!
Here is the in-depth picture of the first horn. You can see the red power wire. It goes to one of the terminals on the Hella and I soldered it on. Then I cut another length of red power wire, stripped it, and soldered it to the same terminal, in order to run it to the second Hella. The green switch wire is the same way. At the bottom of the picture, you can see it spliced in with the original horn wire. If you look closely, you can see a black ground wire coming from the rear of the Hella's mounting bracket, connected to the other Hella terminal, and then to the screw for ground. Almost all the connections are shrink wrapped, if not electrical taped, and all the wires are zip tied out of the way. Nothing touches the radiator or the horns.
Here is just a pic of the wire routing. Again with those great Subaru holes...perfect for running little zip ties to hold the wires! You can see the wires just go to the side of the radiator and back into the engine compartment.
This picture was taken from the rear. You can see the wires coming in from the radiator, and the green switch wire again connects to the original horn wire and the red power wire goes to one of the Hella's terminals. The other terminal gets a short black ground wire to the screw. You can also see that the Hella is mounted on the rear of the mounting tab. Although this is the stock location of my second horn, the Hella is too big to fit angled over behind the headlight, so I improvised in order to keep it on this mounting tab. This is the higher pitched (500hz) Hella mounted here. Again all connections shrink wrapped or electrical taped.
Front view, just the one horn showing here. Sorry about the mismatched grill and the bent hood. Both are salvage parts that I haven't really gotten around to properly repairing yet.
All in all the project took me about 3 hours to complete. I know it sounds like a lot, but I really really took my time in order to make good solder connections, shrink wrap everything, and route the wiring like I felt satisfied with. The horns worked the very first try, and sound fantastic. They are kind of higher pitched horns, but are crazy loud. Inside my closed garage they are even worse. Money well spent to get rid of the wimpy Japanese horn.
I picked these up here --> and using the code QUICK5, got them to my door super fast for $46.93 total., the cheapest price I've ever seen these for.
Anyway, this was my first official write up. Sorry for the stupid dirty engine bay and whatnot. I need to detail my car before my trip to Cali...let me know if I need to add anything or take some more specific pictures/instructions.
Erich