American Auto Wire
Username Post: Rag joint ground??        (Topic#365956)
Halnas66 
Newbie
Posts: 19

Reg: 07-19-20
07-30-21 07:30 PM - Post#2824187    

Donnie... Why does the rag joint have to be grounded from the column side to the steering box side to make the horn work?
Horn relay is grounded to the rad support, the column is grounded to the dash. Only the black wire from the relay to the horn contact and the button in the column allows the horn to work.
It took considerable time for me to find the metal tab in the rag joint was broken....hence the question.

Thanks in advance



 
Donny 
American Auto Wire - Site Sponsor
Posts: 5179

Loc: Bellmawr, NJ
Reg: 09-11-06
08-10-21 03:15 PM - Post#2824894    
    In response to Halnas66

  • Halnas66 Said:
Donnie... Why does the rag joint have to be grounded from the column side to the steering box side to make the horn work?
Horn relay is grounded to the rad support, the column is grounded to the dash. Only the black wire from the relay to the horn contact and the button in the column allows the horn to work.
It took considerable time for me to find the metal tab in the rag joint was broken....hence the question.

Thanks in advance



The horn relay is grounded by virtue of it's case, but that has nothing to do with the horn blowing. The ground portion of the relay is enacted when you press your horn button or ring. It shorts out the ground terminal to the sector shaft of your column, which in turn goes through the copper trace on the rag joint and through to the steering box which is bolted to the frame. The closes the contacts in the horn relay and blows the horn. If that terminal was grounded all the time, your horn would blow all the time.

With any GM product, you are switching the ground on the relay, not the power, much unlike Fords, as they many of them switch the unfused battery 12volt. That is why it is not uncommon to see a steering column fire in a Ford. One of those wires is battery hot all the time, and if it wears through the insulation, it dead shorts an unfused battery circuit which sets things on fire.

Donny




 
Halnas66 
Newbie
Posts: 19

Reg: 07-19-20
08-10-21 05:57 PM - Post#2824906    
    In response to Donny

Hi... Yes, I understand now, after chasing this for a couple of days to find the brass tab in the rag joint broken.
But the steering column is grounded, to the dash with a wire, and being bolted to the dash which is grounded?
Seems like 2-4 ground points, and then it has to be grounded to the frame...?



 
Donny 
American Auto Wire - Site Sponsor
Posts: 5179

Loc: Bellmawr, NJ
Reg: 09-11-06
08-14-21 03:24 PM - Post#2825146    
    In response to Halnas66

  • Halnas66 Said:
Hi... Yes, I understand now, after chasing this for a couple of days to find the brass tab in the rag joint broken.
But the steering column is grounded, to the dash with a wire, and being bolted to the dash which is grounded?
Seems like 2-4 ground points, and then it has to be grounded to the frame...?



The column being bolted in does not help. You have to make a ground wire up and attach it to one of the two bolts that connects the column to the steering box at the rag joint. That will solve your problem. That horn ground shorts directly to the steering shaft, therefore you have to ground that shaft to the steering box.

Donny




Edited by Donny on 08-14-21 03:26 PM. Reason for edit: No reason given.

 
Jones4 
Newbie
Posts: 1

Reg: 11-30-21
11-30-21 09:20 PM - Post#2831660    
    In response to Halnas66

They provide a small amount of flex for a steering shaft within a few degrees of the same plane as the steering gear input shaft. It also provides some damping of vibration coming from the steering system, providing some isolation for the steering wheel. This type of joint has also been used on drive shafts.

bp credit card



Edited by Jones4 on 12-01-21 07:49 PM. Reason for edit: No reason given.

 
docjns1 
"2nd Year" Gold Supporting Member
Posts: 237
docjns1
Loc: upstate NY
Reg: 11-12-19
12-03-21 11:05 AM - Post#2831822    
    In response to Halnas66

Notice on this O.E. style replacement the brass contact from the locating stud to the nut & bolt that passes thru the joint. This is the factory grounding set up. If your replacement rag joint doesn't have a similar design you'll most likely need to attach a wire as stated

Attachment: rag_joint.jpg (19.48 KB) 47 View(s)




Steve
*********
'65 Impala SS, Crocus Yellow/blk
327 / 300 L74
M11 3 on the tree
12 bolt 3.31 open dif


 
Seiber152 
Newbie
Posts: 1

Reg: 12-06-21
12-06-21 09:52 PM - Post#2832064    
    In response to Halnas66

They provide a small amount of flex for a steering shaft within a few degrees of the same plane as the steering gear input shaft. It also provides some damping of vibration coming from the steering system, providing some isolation for the steering wheel. This type of joint has also been used on drive shafts.
MCDVOICE




Edited by Seiber152 on 12-07-21 09:47 PM. Reason for edit: No reason given.

 
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