Python 4105P Remote Start, 1995 Subaru Impreza

I'm assuming the brown horn wire does require a relay, correct?

While you could add a relay, it shouldn't be necessary. The vehicles' Horn wire (Horn Trigger     red/green (-)     @ steering column) needs a low current (-) signal from the 4105. A direct connection is all that is needed using the 4105 Brown wire. If you wanted to verify the current draw, use a Digital Multi Meter set to DC Amp - 10 Amp range. Black test lead to Chassis Ground and Red to the vehicle Horn wire shown above. The horn will sound and the DMM will show the current draw. The 4105 can handle 0.5 Amp output and the DMM should show about 150 mA. Soldering is fun!

Excellent, thank you!

Assuming that the wire color is the same on both the female and male connectors, does it matter which side I splice into? . The steering column side is so much easier to get to, and the color is the same on the other side.

Ok there's seems to be an issue with wire coloring. I have two wiring schematics from two different sources for my 95 Impreza. One says that the horn wire is red/green at the ignition harness. The other says that the park light flash wire is red/green at ignition harness. All I can say is that if I leave the white wire from 9-pin connector connected to the red/green wire at ignition harness the way I had it, the park lights flash with door locks and remain on while the car is running with a remote start. So I'm assuming this is correct. So now I have to find the horn wire, as it appears that it is not the red/green wire. I did hook up the brown horn wire from remote start to the red/green wire at ignition harness just to see if it would work, and it did not. So now I'm in the hunt to find the horn wire. In the meantime, I will look at the previous year and the year after, to see if there may have been a mid-year wire color change. I welcome your thoughts.

Odd that some remote start wiring diagrams say "N/A" for horn.

Those older Subarus do have some conflicting wire info. It appears that you have the Parking Lights working but the info I have is Green/Red (+) (Green with Red stripe). If you have the 4105 Parking Light jumper set to (+) then that is the wire. There might be more than one harness at the steering column to look through for the Red/Green horn wire. I have two sources that say Red/Green. You can use your DMM to find and verify this wire. Set the DMM to 20 V DC. Connect the Red test lead to +12V constant. Connect the Black test lead to the suspect wire. The DMM should go to +12V when the horn button is depressed.Soldering is fun!

Ok thanks. Just need a bit of clarification. Are you saying that the park light flash wire should be green w/red or the horn? Are you also saying that the horn wire could also be red w/green, meaning that there may be another red w/green wire besides the one i am already using? I am using the parking light jumper.

One source has this info on the Parking Lights :    Parking Lamp (+)   GREEN/RED(+)        @ PASSENGER SIDE OF STEERING COLUMN I can't find any wire info source that indicates a Red/Green Parking Light wire. And as posted above, here is the info on the Horm :    Horn Trigger     red/green (-)     @ steering column Notice the different wire color and polarity for each. You should use a DMM to test and verify any wire you plan to use. The 4105 Parking Light jumper has two positions. With it you select either a (+) or a (-) Parking Light output signal on the 4105 White wire.Soldering is fun!

So I found the horn wire. I just disconnected a few other plugs until the horn didn't work and then looked to see if the corresponding wire was in that plug. Turns out that the horn wire is Green w/red. I believe you had mentioned above that one of your sources confirmed this. The red w/green is the park light flash even though most sources say that this wire is for the horn. The horn does chirp when I was trying to program the unit, as the instructions said it would. But I am confused as to why it doesn't chirp on start up? I thought the main reason for the horn is to give the driver an audible signal that the car is started and running? Please advise.