Fitting a leisure battery to a Mazda Bongo

Step 5 Connecting up the VSR

At this point we're about to install the charge circuit so before we do anything else we need to disconnect the starter battery to lessen the electric shock possibility.

Always disconnect the battery terminal that is grounded to the chassis first. I our case the van is -ve chassis earth so we disconnect the -ve battery post first.

Now disconnect the +ve battery post.

Now connect the shorter red cable we made to the +ve battery clamp. At this point there are no fuses installed in either of the red cables. As another little safety precaution, don't put them in yet.
Connect the other end of the shorter red cable into input 1 (marked 12v) of the VSR and tighten the screw.

Connect the -ve cable we made in step 4 to the -ve starter battery clamp and then other end into input 6 (marked 0v) of the VSR.

Once you've connected the starter battery to the VSR you need to install the longer red cable we made up. Connect the unterminated end of the cable into input 3 (marked 6) on the VSR and tighten the binding screw.

I chose to site my VSR on the back of the starter battery fuse cover. To allow me to judge correct cable length I taped the VSR to the cover whilst I working. A more permanent fixing will be sorted out a little later.