Update in the test! So if you are purchasing this harness with the intention of removing and replacing the stock horns then the instructions for this harness and harness in general are meaningless! If you are removing stock horns, the OEM horn connector (vehicle wiring) connects to the new horn terminal(s), then the second horn terminal only needs to be grounded as the OEM wiring already uses the relay and fuse for the OEM . There is no need to even purchase a wiring harness if you are replacing stock horns and have knowledge of wiring and components. (I don't know so I asked a very good mechanic who helped me.) The wiring harness should only be used when adding horns with standard horns, which means a new knob/switch needs to be added to reset the to activate new horns of the abutment market because the wiring harness has a relay. The seller of this and similar products should or should be better informed about the installation and troubleshooting of the products they sell.
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