Finishing Dad's project... CJ7 Straight 6 Wiring Question - JeepForum.com
 
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post #1 of 9 Old 07-03-2020, 04:47 PM Thread Starter
79cj7str86
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Cj Finishing Dad's project... CJ7 Straight 6 Wiring Question

Hi everyone,

I have been working on finishing my dad's CJ7 project he was working on before he passed. I have no experience working with engines or vehicle electric systems, so it's been a humbling, but fun experience so far. However, I've been unable to identify the cable (and where it goes) in the picture attached. I figured I'd check here to see if anyone knows. Also, any suggestions on resources for newbies are totally welcome!

Happy 4th!

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post #2 of 9 Old 07-03-2020, 05:02 PM
redfin188t
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That appears to be a ground cable, can you trace it back to it's origination point?

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post #3 of 9 Old 07-03-2020, 05:11 PM
LumpyGrits
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Battery GND.
Better location is the top mounting bolt of the starter motor.

Have'n you along, is like loose'n 2 good men
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post #4 of 9 Old 07-03-2020, 09:48 PM
BagusJeep
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It could be the ground strap between engine and frame. They did not go to the starter motor bolt originally but that is a good place to relocate them to. You should have a heavy cable from battery negative to starter mounting bolt and a cable to the frame which i usually from the engine to the frame. These will take the heaviest loads but they are poor at creating a path for the small loads which are passing through rusty old bodywork.

Imagine a circuit whee you have installed bright shiny copper wires for only half of it and have rusty steel for the other half, current passing through has a clean journey for only the first half. Hence good practice on an old Jeep is to add some more grounding wires, 12G is fine, to connect the instrument panel and lights and other bits back to the ground strap.

Looks very nice under that hood.

Get the FSM and parts book at oljeep.com. Both will tell you a lot about how your Jeep left the factory.

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post #5 of 9 Old 07-04-2020, 06:49 PM
JEEPFELLER
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My battery ground is in the same hole.

Well, on my Jeep anyway!

----JEEPFELLER
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post #6 of 9 Old 07-04-2020, 10:28 PM Thread Starter
79cj7str86
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Thanks everyone! The other end is disconnected. I should have mentioned that in the post.
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post #7 of 9 Old 07-05-2020, 12:25 AM
BagusJeep
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Hah, knew it!!

That gives you the opportunity to plan your grounding strategy. Most forum posters would put the battery negative to engine and engine to frame on the starter bolt.

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1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #8 of 9 Old 07-05-2020, 05:28 AM
keith460
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Quote:
Originally Posted by BagusJeep View Post
Most forum posters would put the battery negative to engine and engine to frame on the starter bolt.

Not always.... factory location for 1984 model year. Didn't need to add another ground wire to the starter as it gets plenty of juice for starting.
.
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post #9 of 9 Old 07-05-2020, 08:10 AM
LumpyGrits
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AMC bean counters used a wire gauge on the small side to carry the amp load for the starter.
Moving the GND connection to the top mounting bolt of the starter gives the best path for the current flow.

Have'n you along, is like loose'n 2 good men
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