996 Steering wheel into GTS
01-03-2015, 05:01 PM
#1
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996 Steering wheel into GTS
I am installing a 3-spoke 996 steering wheel. I have a 996 tiptronic, airbag clock spring installed on the hub. The first pic of the GTS clock spring, hanging under the pod. That surface would be flush with the hub and face the front of the car, the wires are: 2 brown/white grounds. The center wire is a blue/white or grey stripe. The second pic is the clock rotated upwards and the wires are a ground and the blue/white and go to the airbag.
the third pic is the 996 clock installed on the hub. The wires coming out, go to the air bag. They are green/blue stripe and Green/red strip. The wiring diagram says they are Grey/blue and Grey/red, but I see them as green.
What is the proper way to re-wire this? I assume the GTS clock wires are permentently affixed going in and out. It appears then that I must cut the wires from the car (controller) and splice one spade to a ground that then connects to the 996 wheel for the horn. The other ground and the blue/white should be spliced onto the green/blue and the green/red wires of the 996 connector to the bag. Does it matter which of those is connected to the ground from the car? In the third pic, looking at the 4-wires at near top, the green/red wire is at far right of the 4.
the third pic is the 996 clock installed on the hub. The wires coming out, go to the air bag. They are green/blue stripe and Green/red strip. The wiring diagram says they are Grey/blue and Grey/red, but I see them as green.
What is the proper way to re-wire this? I assume the GTS clock wires are permentently affixed going in and out. It appears then that I must cut the wires from the car (controller) and splice one spade to a ground that then connects to the 996 wheel for the horn. The other ground and the blue/white should be spliced onto the green/blue and the green/red wires of the 996 connector to the bag. Does it matter which of those is connected to the ground from the car? In the third pic, looking at the 4-wires at near top, the green/red wire is at far right of the 4.
Last edited by SteveG; 01-03-2015 at 05:08 PM. Reason: pics
01-04-2015, 11:44 AM
#3
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Watching as I am about to do the same on my GTS.
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
01-04-2015, 12:51 PM
#4
Electron Wrangler
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Do you know how many connections go to the 996 airbag? is it just 2?
If there are just 2 the order shouldn't matter much - but match the red stripe sides if you can. If you have 2 horn connections they may be polarized depending on the grounding of the wheel & horn connections - the 928 grounds through the column but the 996 may not. Of the 4 wires shown - do 2 of them go to the horn connection and 2 to the airbag?
Note on the 928 wiring diagram the connection to C18 is shown on the wrong side of the clockspring - it's on the car side not the wheel side.
From what you describe the colors on the airbag don't match up well against the diagram right?
Be nice to have a 996 diagram of the airbag connections.
Alan
If there are just 2 the order shouldn't matter much - but match the red stripe sides if you can. If you have 2 horn connections they may be polarized depending on the grounding of the wheel & horn connections - the 928 grounds through the column but the 996 may not. Of the 4 wires shown - do 2 of them go to the horn connection and 2 to the airbag?
Note on the 928 wiring diagram the connection to C18 is shown on the wrong side of the clockspring - it's on the car side not the wheel side.
From what you describe the colors on the airbag don't match up well against the diagram right?
Be nice to have a 996 diagram of the airbag connections.
Alan
01-04-2015, 02:13 PM
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Alan, it isn't possible to match colors unless I re-use the bag connector from the GTS clock spring, which I think I will do. Those are blue/white and a ground. The 996 does have two wires to the bag. The question is which ground. But it you look at the first picture, the connections going into the clock from the car may give an indication. One ground is a spade that is permanently fastened to another flat blade in the clock. The other ground (appears to be brown/grey stripe) goes into a round clear plastic formed (female) receptacle similar to how the blue/white is connected. Absent any other indicator, couldn't that be taken that those two are paired?
I may have to open the GTS clock to ID the path the flat connected ground follows from entrance to exit of the clock.
Thanks for your help.
I may have to open the GTS clock to ID the path the flat connected ground follows from entrance to exit of the clock.
Thanks for your help.
01-04-2015, 02:27 PM
#7
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Last edited by Brent; 01-06-2015 at 12:07 PM.
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01-04-2015, 03:36 PM
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Brown is always ground, brown/white is a switched ground (e.g. for the horn). It is likely that the 996 has the horn button between the brown & brown/white wire - you can test this easily right?
On a 928 this would be between the brown/white wire and the column ground.
On a 928 the bag is not grounded at all so connections shouldn't really matter - pretty sure it will be the same on a 996.
The airbag controllers maintain their own reserve power for long enough to detect a crash and ignite both bags even if the vehicle loses all power in an accident - pretty sure it would not rely on vehicle grounding for that exact reason.
Alan
On a 928 this would be between the brown/white wire and the column ground.
On a 928 the bag is not grounded at all so connections shouldn't really matter - pretty sure it will be the same on a 996.
The airbag controllers maintain their own reserve power for long enough to detect a crash and ignite both bags even if the vehicle loses all power in an accident - pretty sure it would not rely on vehicle grounding for that exact reason.
Alan
01-05-2015, 08:45 PM
#10
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Steve.
On the wiring diagram you posted above, just below the 'short circuiting bracket' printing, there is a 'connection' for the two wires coming from the clock spring. That connection is the one I've been describing and both the male and female are orange. The wires from the back of the clock spring to that connector are 9 1/2" long. There are actually 3 wires, one blue/grey, one brown/grey, and one brown with white. The blue/grey and the brown/grey are what are associated with the connector - which is orange on the one I have from a '91 GT.
The orange one from the 996 clock spring connects to where you will disconnect the 928 clock spring from the chassis.
On the wiring diagram you posted above, just below the 'short circuiting bracket' printing, there is a 'connection' for the two wires coming from the clock spring. That connection is the one I've been describing and both the male and female are orange. The wires from the back of the clock spring to that connector are 9 1/2" long. There are actually 3 wires, one blue/grey, one brown/grey, and one brown with white. The blue/grey and the brown/grey are what are associated with the connector - which is orange on the one I have from a '91 GT.
The orange one from the 996 clock spring connects to where you will disconnect the 928 clock spring from the chassis.