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Horn question
So I just finished reading wiring my 70 c10 using the Anerican Autowire Class Update kit. The kit was great and so far have had minimal issues. However, my horn does not work. The horn I installed have two posts on them. The schematic doesn't show a ground and was wondering if I need to ground the other post for them to work. Here is a pic if the schematic not showing ground. The truck is 30 minutes away at my parents or I would just go out wit some test leads and check it.
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