Gen III Battery Relocation


DML FAQ : HOWTO : Gen III Battery Relocation

The Gen III CC hook-up was designed to keep the drilling of new holes to a minimum, to allow recharging and boosting connections to be made from under the hood, and to make it as easy as possible to return the battery to the stock location.

It's been awhile but I think that I used 20 to 22 feet on my club cab and that is with the box over towards the driver's side. I went with 0 gauge welding cable for its flexibility and better conductivity. The power cable runs from the PDC, lays on top of some stuff along the inner fender towards the firewall, then down. It then slips behind the plastic fenderwell liner, into the first hole on the driver's side rail, through the inside of the hollow shaped rail (the rail opens up just around the door handle area), along atop of the rail to the back. It's a bit of a tight squeeze with the gas tank as you bring the cable up to get over the axle, and back to the switch in the bumper. With no cutoff switch, it would run directly to the positive battery post.

Note: Click on any picture to bring up a full size version in a separate window

poscable.jpg poscable.jpg shows how the positive cable is hooked up in the front. The hookup is to the Power Distribution Center. The upper red cable is the one that runs to the cut-off switch in the rear. The lower black cable which is hooked up at the same spot as the red cable is the stock cable that normally runs to the positive post of the battery. You will need to cut off the end part of this cable and attach a connector in order to attach the cable to the PDC.
Note: The original, uncut, stock cable runs to the battery's positive post and then a smaller cable runs from this post to the PDC.
negcable.jpg negcable.jpg shows the setup that I used to do a negative post hookup in the front. This allows me to charge or jump a battery from the front. I bought a battery post and attached it to a nearby, existing hole in the sheet metal. I then just attached the stock, negative cable to it.
ground01.jpg ground01.jpg shows how I grounded the block to the frame. You might not need to do this if your truck isn't a club cab. One end of the ground cable is attached to the bracket attachment of the power steering unit and pulley. The upper black cable (running from the wiring harness) is the stock ground on the '97. I don't remember where the other end is attached but it doesn't provide a "strong" enough ground when relocating the battery in the back on a club cab. The ground cable that I used is attached behind it. It's the bottom black cable which runs towards the ps cap and disappears in the pic under a hose just before the cap.
ground02.jpg ground02.jpg shows where I connected the engine block to the forward frame. I put a copper plated connector on the black cable.
box.jpg The blue cable is the power cable running from the switch into the box. The battery is an Optima, upside down. The black cable runs from the battery's negative post and is grounded to the metal where the spare goes. I have a hard bed lid so I carry my tire(s) in the bed. I would have preferred to attach the box on the pass. side but the box is a better fit over on the driver's side and requires 1 less hole to be drilled into the frame. I compensate at the track by staggering air pressure in the tires. I found that the Taylor Battery Relocation kit contained most, if not all, the installation hardware that was needed at the rear. I believe Morosso (sp?) also has a kit that's sanctioned.
switch01.jpg As you can see, I like to keep drilling new holes to a minimum so I removed one of the license lights and put the switch there. One lamp lights up the plate pretty well. The cutoff switch is a Morosso.

Contributed by: Bob Tom
Last updated: Mon Jul 21 21:00:28 2003