Okay...I have a '99 mustang that's had 2 electrical problems for some time now, and I'm looking to get them fixed now that the weather's better.

1. Horn - I bought my '99 back in 2000 with 12k miles on it. At some point before then the previous owner installed a really lame air horn in place of the factory one, and sort of screwed up the wires. I know the inside switch works, but am unclear of how the wiring goes from the engine compartment to the horn itself. I did find the wires, but was not able to hook them up successfully. In the mean time, I have a switch hooked up to an aftermarket horn and the battery, which I'd like to get rid of. Does anyone have a wiring diagram of this, or any suggestions on how to attack it?

2. Passenger's side window - The passenger's side window is inopperable - it will go down, but not go up. To check the motor, I wired the 'down' wire to the 'up' wire, and the window successfully goes up. I also installed a new switch on the passenger's side. It looks like there's a short somewhere between the wire and the switch. Does the wiring first go from the Driver's side 'master swtich' to the passenger side switch, or do they work independently? Although I tore apart and tested the passenger's side, I'm thinking there might be an issue with the driver's side wiring that affecting the passenger's side. Does this make sense to anybody? A general summary of exactly how the system works and maybe a wiring diagram would help a lot - the diagram I have totally sucks.

 

Horn fixed last night...still working on the window wiring, though. Does the passenger side window swtich get routed through the driver's side?

 

Yes the right switch is tied into the driver's switch.
I doubt it is a short, it is more of an "open". A short
would kill the battery.

Try the drivers side connector at the switch.

 

The battery is getting killed (sorry, forgot to mention that). Well it goes dead if I don't drive it for a few days...I can't be sure, but I think it's tied in with that switch not working.