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 5Likes
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Post By
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1
Post By patrickt
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1
Post By Blas
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1
Post By
10-19-2020, 07:20 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by AdamIsAdam
That strikes me as very dangerous since it's pretty easy to drop a tool or somehow make electrical contact.
...
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Ehhh, I don't know... calling out dangerous on a Cobra is like calling out stink on a pig.  |
10-19-2020, 08:14 AM
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CC Member
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Join Date: Dec 2019
Location: Long Island,
NY
Cobra Make, Engine:
Posts: 205
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Not Ranked
Quote:
Originally Posted by patrickt
Ehhh, I don't know... calling out dangerous on a Cobra is like calling out stink on a pig. |
LOL. Fair enough. 
__________________
Adam
Fulfilling my lifelong dream to own a Cobra... MISSION ACCOMPLISHED!
MKIV FFR 347 cid, Levy T5, 3.55 3-link.
SOLD  Replaced by something with a Flat-6 
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10-19-2020, 09:08 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by spdbrake
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You know, the wiring on my Cobra is far and away of higher quality than on my daily drivers. This weekend I spent several hours chasing down, and finally finding, a faulty ground that is relatively notorious in the Jeep world. One headlight had gone out on me, and showed no ground feed at the light. When I ran a quick supplemental ground to the headlight, the dashboard brake light would stay on! When I ran a supplemental ground to the brake fluid sensor switch, I got the brake light to behave normally. Obviously my bandaid fixes were not the final solution and there was a sneaky ground issue somewhere. When I finally found the answer on a Jeep forum it was a faulty ground in a nine-wire ground bundle to the frame that fails invisibly up from the crimp. From the outside it looked absolutely fine and you couldn't wiggle it to produce any tell-tale effects. But when you cut it open, the connections would literally crumble in your hand.  |
10-19-2020, 10:37 AM
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CC Member
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Join Date: Dec 2015
Posts: 1,442
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Not Ranked
Troubleshooting is fun and your wiring skills are good. I'm just giving you hard time is all.
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10-19-2020, 11:10 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by spdbrake
Troubleshooting is fun and your wiring skills are good. I'm just giving you hard time is all.
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No worries.  The thread on the Jeep forum that solved my problem was literally titled "Are you trying to diagnose bizarre electrical activity? This is your answer." Seriously. There were guys on there saying that when they used their turn signal that the doors would unlock, if they tried to unlock the doors the wipers would start, all sorts of absolutely bizarre stuff. Never underestimate what a bad ground can do, especially in modern cars. |
10-21-2020, 10:14 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,409
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Not Ranked
There are two different paths you can take with a cut-off switch. The easiest and least expensive is a simple on/off switch unit. (I have one for sale in the for sale section) this will be the easiest to install with both wiring and location. It will only disconnect the battery for maintenance, hence locating in trunk (near battery) is the norm. It will “ NOT” Shut off a running car because the cars Wiring harness will just look to the alternator for power and continue to run And switching this switch off with the engine running can cause a dangerous surge and damage electrical components. But for isolation it works just fine. If you want something that will safely shutdown a running car, go to the Pegasus Website (#4430) and purchase their unit. A lot more wiring is involved and locating it has limitations due to all the wiring involved. But it will shutdown a running car safely. Most cars just use the isolation switch. Easy as pie...
Blas
__________________
Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, Cinema Tribute Cars $ GT40’s..
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
Last edited by Blas; 10-21-2020 at 12:28 PM..
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10-21-2020, 03:17 PM
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CC Member
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Join Date: Dec 2019
Location: Long Island,
NY
Cobra Make, Engine:
Posts: 205
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Not Ranked
Quote:
Originally Posted by patrickt
You know, the wiring on my Cobra is far and away of higher quality than on my daily drivers. This weekend I spent several hours chasing down, and finally finding, a faulty ground that is relatively notorious in the Jeep world. One headlight had gone out on me, and showed no ground feed at the light. When I ran a quick supplemental ground to the headlight, the dashboard brake light would stay on! When I ran a supplemental ground to the brake fluid sensor switch, I got the brake light to behave normally. Obviously my bandaid fixes were not the final solution and there was a sneaky ground issue somewhere. When I finally found the answer on a Jeep forum it was a faulty ground in a nine-wire ground bundle to the frame that fails invisibly up from the crimp. From the outside it looked absolutely fine and you couldn't wiggle it to produce any tell-tale effects. But when you cut it open, the connections would literally crumble in your hand. |
What year Jeep?
__________________
Adam
Fulfilling my lifelong dream to own a Cobra... MISSION ACCOMPLISHED!
MKIV FFR 347 cid, Levy T5, 3.55 3-link.
SOLD Replaced by something with a Flat-6
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10-21-2020, 03:22 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by AdamIsAdam
What year Jeep?
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2013 and the ground bundle is known as the G110. It is nine separate wires all crimped to one eyelet that is bolted to the frame on the passenger side of the car adjacent to the engine. |
10-21-2020, 04:15 PM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
Quote:
Originally Posted by patrickt
2013 and the ground bundle is known as the G110. It is nine separate wires all crimped to one eyelet that is bolted to the frame on the passenger side of the car adjacent to the engine.
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Can we see a photo of this ground terminal arrangement please Pat?
__________________
Gary
Gold Certified Holden Technician
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