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Stock JK TechBulletin board forum regarding issues with OE (original equipment) components of the Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) such as factory suspension parts, engine, transmission, body parts, interior fixtures and the on-board computer.
@availtech , thank you for posting those ground locations. Is yours a 3.8 liter? I've got a 2013 JK with a 3.6. I was able to find G100, G102, G103, and G105 using your diagrams and photos. However, on my Rubicon, I did not find G101/104 together under the heat shield. Instead, I had to pull the passenger side wheel well cover and then a single ground is on the block. Additionally, I have an additional engine compartment ground on the driver's side by the washer reservoir. Photos below. Block ground, passenger side, remove liner. Ground, driver's side, behind washer reservoir
Just uploaded in the hopes it helps someone track down an erratic electrical problem.
The ground in your top photo, on the side of the block, where does the other end of hte wire go? From the block to where?
I had one of the ground studs on the body in the engine bay break off during a repair (similar to the location you have circled above). Is it okay to use a self tapping screw and make a new ground next to the broken stud, and if so, is there a specific combo of washers that I should use to build up the ground stack? (First electrical repair I've had to do; conquered the spider gears thanks to @karls10jk and @resharp001 a few years back...hoping the forum can help here as well. Pic attached for reference....
I have the MOPAR service manual for the JK and found it's missing some information, namely the locations of some of the engine bay grounding points. I thought I'd post this with all the locations identified for easy reference:
G100
G101 and G104 - These can be found under the heat shield near the catalytic converter on the right side (passenger for US folks) of the motor
G102 - This one is missing from the service manual. It's located just to the left of the right side (passenger) headlamp assembly, near the power steering reservoir:
G103 and G105 - Right (passenger) side of the engine bay
Hope this helps!
My 2010 JK Rubi with 150,000 miles on it has gone through four starters within a month. They'll start when it's cold but once the engine warms up they won't restart. All the electrical connections have been checked except for all the grounds. Not sure if I can read G101 and G104? When I do check the other grounds the continuity shows 12.7 V. (I haven't checked them when it was started since that's a problem.) If I'm correct, ground off of G101 goes to the firewall. I did clip my meter there and it read 12.7 V also. Should I try to reroute that ground since I can't reach it? Or is it good.This is very confusing and frustrating! All suggestions welcomed.
Good info, thanks for posting. Do you know of good grounding locations behind the glove box? I want to ground my CB radio directly rather than routing extra wires into the engine bay.
You might over load the ground currently being used.
You might over load the ground currently being used.
What could happen if I did that? Should I disconnect the fautly ground to the firewall? At this point, I haven't added the engine ground from the negative battery terminal to one of the alternator mounting brackets.
If the ground location is directly to the frame, there's no chance of overload. If it's to an intermediate pigtail, then to ground, then maybe. The key is that the ground needs to be as big or bigger than the sum of all of the 12VDC feeds going to whatever is being grounded.
If the ground location is directly to the frame, there's no chance of overload. If it's to an intermediate pigtail, then to ground, then maybe. The key is that the ground needs to be as big or bigger than the sum of all of the 12VDC feeds going to whatever is being grounded.
The ground will be from the negative battery terminal to a bolt of the bracket that supports the alternator. I will use a standard 4 gauge battery cable. Would this be adequate to avoid any overload?
