I mounted a set of Viking Horns on my 16 F350. Each horn has its own - and + wires. The instructions say I can wire the 2 pos together (same for the neg) then connect them to the factory horn plug. After doing so, only one trumpet worked. Double checked all wiring and same result. I than ran both wire direct to battery and they both worked. Retried the factory plug and only one worked. Maybe horn relay puts out 12 volts. Any suggestions?

 

Wow, Just glad it was nothing important...

 

Thanks for all the replies (even the one I can't see, unless its my own). 8 days and 97 looks and no replies.