Im just about done installing my ARB twin, but have one question. In the instructions it says to run the power wire for the switch to a key on power source. I was gonna use the cigarette lighter but it's a pain to get to. Is there a problem with running power to the switch straight from the battery? If I do, does it need to be fused? I chomping at the bit to connect this one last wire so I can try it out. Any help is appreciated.

 

You can wire direct to the batt but you will need a fuse for sure

 

I take it you have the main power lead already installed, and fused, and this is about the control circuit only. Correct?

If you run the wire from the battery, it should be fused based on the wire size.

You can also see this thread for your switched power source. Fuse it for the wire size you have going to the switch.

https://www.jk-forum.com/forums/jk-e...source-191552/

 

Yes, the main power for both compressors are run and fused separately. This is just for the control circuit. What amp fuse should I use if it's just for the switch?

 

If it's not in the instructions, call ARB.

The fuse rating depends on the load the circuit will carry, and the wire size.

 

The control circuit for the relay coil draws around 150 mA max. I have the single not the twin but you can look the relay up in it should tell you coil current, it should be similar. Alternatively you could use a fuse tap coming off a a spare accessory switched circuit in the fuse box and buy a pack of low current fuses to use.

CG

 

Control circuits usually carry very little current. Therefore, It doesn't really make any sense to size the wire according to the load. If you did, It would probably be a 22 awg or smaller. With a fuse rated in the mA range. So just to make life simple for the installer. Generally, most control circuits are compromised of a 16 awg circuit protected by a 3 Amp fuse. This combination will provide more than adiquit current carrying capabilities and circuit protection for several relays.

 

Youre pretty good.
I just installed lights that came with a 3amp fuse of the control switch.

Just bought this compressor and need to think about this all over again.