Battery Isolator Switch

One little upgrade I've wanted to do for a while is fit a battery isolator switch. The immobiliser system can drain the small Banner battery over a number of weeks, so previously I've been removing the negative lead when the car isn't used for a week or so. An isolator switch is a much more convenient solution.

I didn't want the full FIA isolator that sits on the outside of the car, so I decided to get this one from Jack Webb Motorsports. It is a simple break switch that sits on the negative side of the battery. This was originally designed for cars which don't have a heater, and when I initially received the unit it was clear that there wasn't space around the heater hoses to fit it to the earth point on the scuttle.

Thankfully Jack was able to produce a new version with the orientation of the earth connecting bolt eye and jump lead reversed, and this fitted fine.

Now I can isolate the battery by just turning the red switch by 90 degrees..