Subaru Outback Forums banner
1 - 1 of 1 Posts

·
Premium Member
2005 3.0 R n totaled
Joined
·
7,523 Posts
As far as I know, any additional horn(s) might require additional relay(s)...if the stock (OEM) is designed just for 2. If you add any more than what the OEM is designed for, you may need additional relay(s)....
The relay allows you to control a large current with a smaller switch and horn wire. Without it, you may need a heavy duty horn switch with a heavy gauge (AWG) wire.
 
1 - 1 of 1 Posts
Top