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Horn resistance in CPU??

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Old 09-16-04, 11:21 AM
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Horn resistance in CPU??

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.
Old 09-16-04, 11:28 AM
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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?
Old 09-16-04, 01:19 PM
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How have you wired the bypass??? You need a relay in there, or the horn switch will burn out
Old 09-17-04, 05:15 AM
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Originally Posted by Icemark
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.
Old 09-17-04, 09:20 AM
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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.
Old 09-17-04, 11:15 AM
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Thats exactly how I wired it. I noticed the horn units themselves looked rusty, maybe the problem lies in there. thanks for the input
Old 09-17-04, 11:56 AM
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yeah, check to see the horns are both working
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