redarc

Hi everyone just passing on a bit of info, I have a 98 patrol and recently had a
redarc isolator installed (by a local auto lecky) in addition to the isolator I asked them to install cable to the rear fitted with a anderson plug for the batteries in the camper.Now when I hooked the camper up to the car, plugged in the batteries the fuel gauge in the car read empty. The reason being the earth was not to the battery as requested but to the chassis at the isolator end and the plug end.Upon further investigation the nissans have rubber fitted between the chassis and the body.All good now.Thought I would let you all know if anybody is doing the same thing.