Woeful lack of honking.
Woeful lack of honking.
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Dammit

Original Poster:

3,815 posts

236 months

Saturday 2nd December 2017
quotequote all
I purchased a Porsche (Momo) Cup wheel in order to get a bit more reach, and today I dropped into Precision Porsche in order that they might fit it.

Whilst they've fitted hundred of these wheels to 993's and even more to 964's mine was the first 996 they've had in for re-wheeling.

We ran into an issue- the steering column on the 996 is not a ground as it is in the older cars - and the horn is designed to use the column as a ground.

So we're a bit stuck - I'm sure we can get round this, but has anyone else plowed this particular furrow before us?

Dammit

Original Poster:

3,815 posts

236 months

Saturday 2nd December 2017
quotequote all
That - I believe - is the live contact? Which we have, it's the ground that is required.

Forgive me if have misunderstood.

mybrainhurts

90,809 posts

283 months

Saturday 2nd December 2017
quotequote all
It's PLOUGHED, dammit.....smile

Pope

2,653 posts

275 months

Saturday 2nd December 2017
quotequote all
Originally all the connections came in with the clock spring unit; ditching that gets rid of the Airbag and horn connections.

The link I quoted was for earlier cars so I deleted it to avoid a mis-info loop!

Unless you can reincorporare the clock spring I think you're scuppered frown

edc

9,588 posts

279 months

Saturday 2nd December 2017
quotequote all
Have a look on boxa.net A couple of guys have done this for their 986. I think one had a horn switch on the dash but another got it successfully working.

LaSource

2,641 posts

236 months

Saturday 2nd December 2017
quotequote all


I'm using a momo cup wheel in a 996 and the horn works fine...though I do recall there is meant to be some tweaking that needs to be done for this.
Sorry not more helpful as I had a garage fit it for me. But just wanted to say 'it can be done'

poppopbangbang

2,577 posts

169 months

Saturday 2nd December 2017
quotequote all
You just need the correct boss, in my case it was off the shelf OMP which retained the clock spring unit and therefore all original wiring. I just terminated the original horn wires into spades and they attached to the horn push accordingly.

20 minute job from start to finish and that includes making a resistor pack for the SRS to avoid the warning light.



The plastic cover over the clock spring is a bit fugly but I plan to have that trimmed in leather.

Dammit

Original Poster:

3,815 posts

236 months

Saturday 2nd December 2017
quotequote all
I know it can be done with Porsche parts, therefore I’d like to do so- whilst admitting that this is making a rod for my own back.

ontheloop

116 posts

173 months

sundayjumper

531 posts

310 months

Sunday 3rd December 2017
quotequote all
Yes, I had the same problem when I put an RS wheel in mine. You'll probably find the horn works if the steering lock is on ?

The solution is to add an earth to the column. It was easy enough to do.... I just can't remember exactly how I did it ! I'll have a dig around tomorrow to see if I've got any pics.

sundayjumper

531 posts

310 months

Sunday 3rd December 2017
quotequote all


Dammit

Original Poster:

3,815 posts

236 months

Sunday 3rd December 2017
quotequote all
ontheloop said:
Thanks! Unfortunately this chaps car seems to have a grounded steering column: "The bullet connector is then connected to the elbow pin - make sure it is snug. This connection provides the horn power. The other wire from the red plug does not need to be connected as the horn button will connect to earth through the hub & steering column when the horn button is pressed. "

Dammit

Original Poster:

3,815 posts

236 months

Friday 8th December 2017
quotequote all
An update on this:

The column is grounded, sometimes. What does that mean? There are two parts to the column, inner and outer - the inner section is the one to which the horn attempts to ground.

At certain positions (with regards to it's possible range of extension) the inner column does find ground via it's bushing, to the outer column.

At full extension it does not, apparently - so we're going to need a physical (wired) connection between inner and outer column if I am to be able to use the wheel at maximum extension (which is the entire point of this exercise).

I'll drop the car into Precision for the work tomorrow, hopefully we'll get everything fully operational - and without a horn button screwed to the dash.

Dammit

Original Poster:

3,815 posts

236 months

Saturday 9th December 2017
quotequote all
Ok, a further two hours spent on this today and we have at least confirmed one thing- the column is extremely well insulated/isolated.

The kit from Carnewal cannot work on (at least this) 996, not if you want a horn that works anyway.

Bit of a shame that it's taken four hours of trying to get to this point- an expensive failure, basically the cost of the wheel spent on technicians hours to discover that the wheel has to go back.

I'm unimpressed that this wheel is advertised as being suitable for a 996, with the included parts, as this is (to my knowledge) untrue.

sundayjumper

531 posts

310 months

Monday 11th December 2017
quotequote all
I have exactly the same wheel, and it works.



(cheapie ebay steering wheel cover to keep my grubby mitts off the suede when I'm working on stuff smile)

jakesmith

9,497 posts

199 months

Monday 11th December 2017
quotequote all
sundayjumper said:
I have exactly the same wheel, and it works.



(cheapie ebay steering wheel cover to keep my grubby mitts off the suede when I'm working on stuff smile)
sick threads bro

poppopbangbang

2,577 posts

169 months

Monday 11th December 2017
quotequote all
Dammit said:
Ok, a further two hours spent on this today and we have at least confirmed one thing- the column is extremely well insulated/isolated.

The kit from Carnewal cannot work on (at least this) 996, not if you want a horn that works anyway.

Bit of a shame that it's taken four hours of trying to get to this point- an expensive failure, basically the cost of the wheel spent on technicians hours to discover that the wheel has to go back.

I'm unimpressed that this wheel is advertised as being suitable for a 996, with the included parts, as this is (to my knowledge) untrue.
You can use the OMP boss with that wheel, as far as I know this is an issue with any 996 with PSM that uses the large black plastic clock spring assembly and what you have will work fine on any other 996/986 without PSM as they don't have the same clock spring assembly (no steering angle sensor built in).

Dammit

Original Poster:

3,815 posts

236 months

Monday 11th December 2017
quotequote all
An email from Gert arrived today, apparently a small hole needs to be drilled in the black metal part of the steering column (pointing finger) and an earth wire then attached to a screw through said hole.



Being transparent I am unclear how this section of the column connects to the inner, rotating part of the column, possibly magical unicorns are involved.

Dammit

Original Poster:

3,815 posts

236 months

Monday 11th December 2017
quotequote all
poppopbangbang said:
You can use the OMP boss with that wheel, as far as I know this is an issue with any 996 with PSM that uses the large black plastic clock spring assembly and what you have will work fine on any other 996/986 without PSM as they don't have the same clock spring assembly (no steering angle sensor built in).
I'm cable throttle, which I thought meant no PSM - instead I have anti-slip/anti-skid (precursors to the fill stability control gubbins)?

poppopbangbang

2,577 posts

169 months

Monday 11th December 2017
quotequote all
Dammit said:
I'm cable throttle, which I thought meant no PSM - instead I have anti-slip/anti-skid (precursors to the fill stability control gubbins)?
I don't know if that has a steering angle sensor, possibly? Don't suppose you have a pic of the clock spring do you? I could compare it to mine and let you know.