Thread: Accessories 12V Feed in ENgine Bay near battery?

I am not sure quite what you are trying to achieve.

Are you using a Redarc for a twin battery system?

Originally Posted by BigJon

I am not sure quite what you are trying to achieve.

Are you using a Redarc for a twin battery system?

Yes thats it.

Instructions supplied say blue wire on solenoid must be wired to ignition,accessories or direct to start battery.

Rez

Wire it to the start battery. I am guessing it is a voltage sensing wire.

Redarcs work by only connecting the second battery after the first one has sufficient voltage. They will disconnect if the first battery voltage drops too low.

Hence you wire the things you want to run (fridge, etc) off the second battery. The redarc will let you start off the first battery and once it has sufficient charge it will connect the second battery to charge it. If the engine is not running and the starter battery voltage drops too much because of load on the second battery it will disconnect to prevent the start battery from being flattened.

Your accessories (fridge, etc) will continue to draw power from the second battery.

The blue wire is the "manual over-ride" connection to connect the two batteries in parallel. You can wire it to a switch (off the ignition or elsewhere)or simply carry a jumper wire to connect the blue wire to one of the batteries.

Originally Posted by Rezley

G'Day All,

Want to wire my Red Arc via accessories so its not constantly hardwired to main battery so it will switch when accessories are on.

Is there an accessories feed in engine bay anywhere that relatively easy to locate?

Thought I'd ask those whom may have come across this before I trace one in cabin and feed a wire through firewall.

Cheers and Beers,
Rez

Are you looking for a sense wire to activate the solinoid when you switch the ignition on?

Originally Posted by discojim

Are you looking for a sense wire to activate the solinoid when you switch the ignition on?

Yeh thats pretty much all I need.
Since writing it I've thought there must be something in the fuse box right near battery so I'll get the multimeter onto it.

I'd rather not have it wired straight to start battery. I'd like the connection cut so to speak when ignition is off.

Rez

If the redarc you have is the same as the ones we use on our work Toyotas it won't do what you want it to do. As mentioned the blue wire is for connecting the batteries together when the start battery is flat so you can self jump start.

The voltage sensing for connection / disconnection is internally measured off the thick wires that electrically join the batteries, not through any external wires.