Anyone know off hand what it is? I ran my own setup, bypassing the CPU relay, but the horn sounds different. Im guessing that the original setup wasn't putting 12V to the horns, so I was just going to put a variable resistor in line with them.

 

Since the same power circuit is used for both the relay coil and the horn(s), taking the coil out of the equation will result in less of a voltage drop. Is the horn higher-pitched now?

 

How have you wired the bypass??? You need a relay in there, or the horn switch will burn out

 

I put a relay in there. I just tapped off the blue/orange wire used to go to the buttons from the CPU relay. I ran this wire to the ground side of the realy. The horn now makes a higher pitch, it sounds kind of funny, I don't like it.

 

Well there are no resistors so maybe you wired it funny, or missed one of the horns??

Normally you would bypass the CPU horn circuit with a relay wired like this:

85 to the horn switch wire coming from steering column
86, 87 to 12 volts
30 to the wire running out to the horns from the CPU.

 

Thats exactly how I wired it. I noticed the horn units themselves looked rusty, maybe the problem lies in there. thanks for the input

 

yeah, check to see the horns are both working