SIR coil
Thread Starter
Intermediate
Joined: Aug 2007
Posts: 26
Likes: 0
From: Franklin Park New Jersey
SIR coil
I have a 1990 with a broken horn connection. I've done these before, but this car has an air bag coil thing sitting there after I removed the steering wheel. Can someone please tell me how to remove it in order to get to that white plastic socket assembly that used to hold the horn connector bayonet in?
Got the airbag out and pulled the steering wheel as well. Now I see a coil assembly that the airbag wire came from. It looks like a television yoke (round, yellow) and is inserted in the column housing. There are exact placement warnings etc. on it, but I don't know if I should just pry it out or does it interlock somehow? Have to get it out of the way to get to the broken horn part.
This time I have pictures
Ivan
Got the airbag out and pulled the steering wheel as well. Now I see a coil assembly that the airbag wire came from. It looks like a television yoke (round, yellow) and is inserted in the column housing. There are exact placement warnings etc. on it, but I don't know if I should just pry it out or does it interlock somehow? Have to get it out of the way to get to the broken horn part.
This time I have pictures
Ivan
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 41
From: Baltimore, MD USA
Make sure the steering column is centered.
So you've removed a M14x1.5 nut then removed a ring retainer and now should be able to lift the Sir Coil out over the shaft and leave it hanging over the column.
As you pull up on the Sir Coil reach down with your other hand and kind of tug on the yellow harness that goes down the side of the steering column to get some slack as you pull up on the Sir Coil.
As you pull up on the Sir Coil a spring loaded locking tab will pop out of the bottom of the Sir Coil and automatically lock the wound up spring inside the Sir Coil so its position doesn't change.
If you should push on the locking button by mistake the spring will unwind into an unknown position. So if that happens when you are ready to reinstall it, you need to flip it upside down and follow the instructions to manually recenter the clock spring.
Here's the picture of the top view of the Sir Coil.
Here's a picture of the back/bottom of the Sir Coil and the instructions how to manually reset it if for some reason the spring unwinds.
So you've removed a M14x1.5 nut then removed a ring retainer and now should be able to lift the Sir Coil out over the shaft and leave it hanging over the column.
As you pull up on the Sir Coil reach down with your other hand and kind of tug on the yellow harness that goes down the side of the steering column to get some slack as you pull up on the Sir Coil.
As you pull up on the Sir Coil a spring loaded locking tab will pop out of the bottom of the Sir Coil and automatically lock the wound up spring inside the Sir Coil so its position doesn't change.
If you should push on the locking button by mistake the spring will unwind into an unknown position. So if that happens when you are ready to reinstall it, you need to flip it upside down and follow the instructions to manually recenter the clock spring.
Here's the picture of the top view of the Sir Coil.
Here's a picture of the back/bottom of the Sir Coil and the instructions how to manually reset it if for some reason the spring unwinds.
Last edited by Hooked on Vettes; Jun 9, 2009 at 01:38 AM.
Thread Starter
Intermediate
Joined: Aug 2007
Posts: 26
Likes: 0
From: Franklin Park New Jersey
Hooked on Vettes-
Many thanks!
I was able to remove the snap ring and gently remove the coil without any adverse effects.
(I would be aware if I heard a zinging noise if it became undone, right?)The coiled spring is floating freely in the housing. It came right off and below it i see the familiar silver round spring ring that retains the steering locking plate. I don't recall how to remove that snap ring in order to get to the broken plastic piece beneath it. I tried prying it with a sharp object, but it wouldn't budge. Do I have to somehow remove the pressure from that notched locking plate and then pry out that round clip?
Also, would you know the P/N or where I can purchase a new plastic horn attachment assembly?
Thank you,
Ivan PS For my information, you referred to a spring loaded locking tab that will pop up. In the last diagram, is this spring loaded locking tab the "locking tab" or the "Spring " depicted in the diagram?
Many thanks!
I was able to remove the snap ring and gently remove the coil without any adverse effects.
(I would be aware if I heard a zinging noise if it became undone, right?)The coiled spring is floating freely in the housing. It came right off and below it i see the familiar silver round spring ring that retains the steering locking plate. I don't recall how to remove that snap ring in order to get to the broken plastic piece beneath it. I tried prying it with a sharp object, but it wouldn't budge. Do I have to somehow remove the pressure from that notched locking plate and then pry out that round clip?
Also, would you know the P/N or where I can purchase a new plastic horn attachment assembly?
Thank you,
Ivan PS For my information, you referred to a spring loaded locking tab that will pop up. In the last diagram, is this spring loaded locking tab the "locking tab" or the "Spring " depicted in the diagram?
Drifting
Joined: Jan 2003
Posts: 1,894
Likes: 3
From: Reading PA.
Ivan I used a dental pick to pull the wire ring off. It's a little tough. When I removed the air bag coil assy. I had a tool from snap on that threaded on the steering shaft and pushed down on everything so my hands were free to use the snap ring pliers. After I got the small wire ring off I gently squeezed it back into shape when I re installed it. I'll look for the part # from GM but they want like $30 for it. I think auto zone wants $11 Bill
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 41
From: Baltimore, MD USA
Here's what that horn connector lead looks like.
One end connects to the horn buttons and the other end has a spring that is housed inside a plastic tube.
Usually the two notches at the end of the plastic tube crack so the spring no longer makes contact with the plate inside the steering column.
To remove it, you really don't need to remove the Sir Coil.
You press down on the plastic tube and turn it counter clockwise and it should release upward. Then just pull it out. To reinstall it press down and turn the plastic tube clockwise and release it.
The first picture shows the complete horn lead.
I think the second picture shows a close up of just the plastic tube. Notice the end how it locks in place.
Corvette Central shows the part is for a 84-89 but it appears the 90 is the same. They call it a Horn lead.
Sounds like it's a generic part since Pipe says Autozone sells it.
One end connects to the horn buttons and the other end has a spring that is housed inside a plastic tube.
Usually the two notches at the end of the plastic tube crack so the spring no longer makes contact with the plate inside the steering column.
To remove it, you really don't need to remove the Sir Coil.
You press down on the plastic tube and turn it counter clockwise and it should release upward. Then just pull it out. To reinstall it press down and turn the plastic tube clockwise and release it.
The first picture shows the complete horn lead.
I think the second picture shows a close up of just the plastic tube. Notice the end how it locks in place.
Corvette Central shows the part is for a 84-89 but it appears the 90 is the same. They call it a Horn lead.
Sounds like it's a generic part since Pipe says Autozone sells it.
Last edited by Hooked on Vettes; Jun 9, 2009 at 07:14 PM.
