Chassis Ground Diagram

[chorky]

A while ago someone posted a really great diagram of the whole truck, and primary grounding locations as well as how those wires go to major components.

Would be awesome if that could be posted here again. Searching didnt net the result I was looking for.

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[OHJeeper]

I've had this thread bookmarked for awhile...

https://www.jeepgladiatorforum.com/forum/threads/gladiator-wiring-diagrams-shared-with-jl.34896/

One of the links is a "Ground Location" diagram.

Fair warning, I've found some of the diagrams are not 100% aligned with the JT (colors and locations mostly)

 

[chorky]

I've had this thread bookmarked for awhile...

https://www.jeepgladiatorforum.com/forum/threads/gladiator-wiring-diagrams-shared-with-jl.34896/

One of the links is a "Ground Location" diagram.

Fair warning, I've found some of the diagrams are not 100% aligned with the JT (colors and locations mostly)

I was looking at those links earlier. But somewhere on the forum is a ground map (like your link for the JL) but specific to the Gladiator. I'm looking for ground locations for back around the bed.

 

[ShadowsPapa]

This?

 

[chorky]

YESSIR! Thank you

 

[ShadowsPapa]

YESSIR! Thank you

It's really too bad that modern wiring diagrams don't show exact locations, only generalized locations, and they don't show true schematics, only block diagrams.
For example, they are effectively worthless for determining where the wires for the license plate lights are. The harness is a loop, connected on the left and the right side - why?
The harness has both the park sensors and license plate lights, is connected on the left frame rail, runs along the bumper, then to the right frame rail and is connected to a harness there.
Doesn't say where the source is or the ground because both left and right frame rail connections have ground connections.

THIS is a schematic, and there's another page that shows exactly where every connector is, and every single ground. In detail - not generalized.

 

[chorky]

It's really too bad that modern wiring diagrams don't show exact locations, only generalized locations, and they don't show true schematics, only block diagrams.
For example, they are effectively worthless for determining where the wires for the license plate lights are. The harness is a loop, connected on the left and the right side - why?
The harness has both the park sensors and license plate lights, is connected on the left frame rail, runs along the bumper, then to the right frame rail and is connected to a harness there.
Doesn't say where the source is or the ground because both left and right frame rail connections have ground connections.

THIS is a schematic, and there's another page that shows exactly where every connector is, and every single ground. In detail - not generalized.

Well I would hope the EVTM (if it's even called that anymore?) still has all that detailed spec. I haven't seen one though since...oh, 2006? I think my TJ has one. But I wouldn't be too surprised if those schematics aren't even produced anymore. Maybe digitally? I remember every year the shop would get sent boxes of books with new manuals and EVTM's and corrections to old ones to put in file. But that was back in days of paper books. What is a paper book anyway? haha. Man time sure changes fast....

 

[ShadowsPapa]

Well I would hope the EVTM (if it's even called that anymore?) still has all that detailed spec. I haven't seen one though since...oh, 2006? I think my TJ has one. But I wouldn't be too surprised if those schematics aren't even produced anymore. Maybe digitally? I remember every year the shop would get sent boxes of books with new manuals and EVTM's and corrections to old ones to put in file. But that was back in days of paper books. What is a paper book anyway? haha. Man time sure changes fast....

I recall seeing that the AMC schematics for the charging system varied somewhat. The V8 of some years showed the redundant excitation wire for the alternator connecting to the ignition feed after the ignition resistance wire, and for the I6 it was connected to the ignition feed before the resistance wire.
I had occasion to speak with one of the engineers from AMC while at an event in Kenosha several years ago - he was one of their electric engineer guys.
I asked him why I was seeing variations in some of the schematics -gave that example and said I had seen others but they made no sense. He said when he started and took over a specific area of the electric systems - it was up to him how to wire things. As long as it operationally was identical, and there was no change to troubleshooting, it was his call on where things may be connected and how. If he felt it was easier to have a connection in a different spot, he did it. Sometimes he felt it might have an advantage other than physical location, but it was often up to them to decide, their preference.

When I did the transplant of the Jeep engine into my car, I had to have both books open at the same time. The car was simple - only 2 or 3 pages unless I got into the door locks and power windows. The Jeep - I had to use several sheets and keep referring back to PCM connector pin locations on another page and keep the numbers and letters straight. Following the cruise control wiring and switch meant at least 2 pages. And of course, I had to merge that with my car and modify how the car's switch worked so I had to create my own diagram of the results.

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