Jeep Cherokee Electrical Upgradesby Dino Savva The factory 12v power cables and grounding cables are adequate on a stock Jeep Cherokee but for me, adequate doesn't cut the mustard. If you plan to upgrade to a higher output alternator to compensate for any extra electrical items that you've added to your Jeep (e.g. high wattage ICE system, driving lights, electric cooling fans, air compressor, winch), the stock power cables would no longer be man enough for the job. The grounding cables would also be inadequate and that braided strap cable going from the cylinder head to the firewall is a joke!
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Old Cables
The first task is to remove those wimpy 8AWG factory cables. ALWAYS begin by removing the grounding cables first. You have three (battery to block, battery to inner passenger fenderwell, and that joke of a cylinder head to firewall strap cable). Getting to the 18mm nut that holds the strap cable to the rearmost driver's side head bolt is a real PITA so make sure you have a socket wrench with TWO swivel joints, otherwise you'll be doing a lot of cussing to get it off and get it back on again! |
New Cables
Now you can install your new man-size cables but before you do that, you'll need a pair of heavy duty brass battery terminals. If you're not confident enough to make your own cables, I suggest you buy the complete set from John Kelley (aka 5-90 in the NAXJA forum): |
Extra Ground Cables
To close the "grounding loop" (battery to block, block to firewall, firewall to cylinder head, cylinder head to battery, battery to inner fenderwell), I added two extra cables; one from the block to the firewall, and the other from the cylinder head to the battery. |