Relays are recommended if high load devices will be connected to the alarm and shift light outputs. They are required when using rev-limiter functions. The heavy-duty automotive fuse must be used on the line supplying power to the IntelliDash.
 

12v 30A Relay w/Mounting Tab

P/N: OPT-RLY-1

MSRP: $4.95

1/2 Amp Fuse & Holder