Anyone use an add-a-circuit on an '08 xB? I just picked one up for my lighting & haven't used one before. What slot should I use if I want to be able to switch them on w/out the car on?

I don't want to splice into something like the cig lighter for this, so I want to use an add-a-circuit to go straight from the fuse panel to a switch to my lighting. I just don't know what slot on the fuse panel to use...

Thanks for the offer, but I'd rather use the add-a-circuit.

It can be used to add a fuse to the fuse panel in a slot that's already occupied, or an empty one. From what I understand, if there's a fuse in the slot you want to use, you take it out, plug in the add-a-circuit and plug the old and new fuses into the add-a-circuit. It has the red power wire running out to whatever new accessory you want to add. I'll be using it to hook up a few sets of cold cathodes and several LEDs, all running through a switch of course. I'm thinking I want it hooked up to constant power, but I don't know what slot in the fuse panel to use... anyone?

Oh, and I got it at Pep Boys for under $10, but I think Autozone sells them for around $5. PB is next door to my office, so the extra $ is worth not having to drive across town.

Here it is... Our xBs take the mini ones...

I just posted this over on YStC in response to a question about wiring cold cathodes & using the add-a-circuit. I figured it's good basic information that should be shared

As stated, the add-a-circuit just plugs into a slot in the fuse panel that is either empty or occupied. It, as it's named, adds a circuit. It has two fuse slots built into it and one power lead. You will run that power lead to the switch. If the switch is lighted, you will need to ground it. Then you run the power from the switch to the cold cathodes and you also need to ground those. Standard colors: red=power, black=ground. There should be a grounding location under the panel on the left side of the driver's side foot well. Keep in mind that the cold cathodes that Oznium sells are .7 amps per set, so do the math and use a fuse that is just higher than that number. For example, if you have three sets, you can use a 3amp fuse. The add-a-circuit comes w/ different amp fuses & can handle up to 10 amps. BTW, you'll need the mini add-a-circuit if you go that route.