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What would cause my 2002 Pontiac Montana's horn to start blowing for no cause?
Wiki User
∙ 7y ago
Faulty horn switch, faulty horn relay, or a short to power somewhere in the wiring. Power should be constant at the 30 pole of the relay, and should only be present at the 86 pole when the horn switch is depressed.
Wiki User
∙ 7y ago
Wiki User
∙ 7y agoA problem at the switch in the steering wheel.
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