Momo steering wheel
Discussion
Easy there Tiger.
Do you have the correct boss for your car? Is it a genuine Momo part of a cheapo Chinese copy, or from another brand?
Does it have an integrated horn ring or does it use the original Porsche part taken off the rear of the original wheel?
What year car do you own and did you buy the boss new or used?
It may be that it needs w wipe, but it is far more likely that it is the wrong part and a wiring fire will be likely outcome!
Do you have the correct boss for your car? Is it a genuine Momo part of a cheapo Chinese copy, or from another brand?
Does it have an integrated horn ring or does it use the original Porsche part taken off the rear of the original wheel?
What year car do you own and did you buy the boss new or used?
It may be that it needs w wipe, but it is far more likely that it is the wrong part and a wiring fire will be likely outcome!
Are you saying dont add an earth wire?
The boss is a genuine Momo part,there is only 1 connection on the Momo wheel horn button, but viewing the ones on ebay they have 2,maybe I should refit the original wheel to my 1990 S2, if it is going to turn into a problem for me, thought it just might be a straight forward swap over
The boss is a genuine Momo part,there is only 1 connection on the Momo wheel horn button, but viewing the ones on ebay they have 2,maybe I should refit the original wheel to my 1990 S2, if it is going to turn into a problem for me, thought it just might be a straight forward swap over
So: you car is a series two 944 and you are using a Momo boss. This means that it has an integrated horn ring, making it model specific (all 944s from September 1985 and all 968s).
Did you buy the Boss new or are you relying on someone elses description? In my experience many vendors write 924/944/968/(828 even, sometimes!) with little idea what really fits what. If you are certain that the boss suits an oval dash 944 then there wont be any risk of melting anything.
Can you take a photo of the horn ring, and pressed metal spacers used to mount the horn button and the wire (most Momo wheels other than a Prototipo use a later larger centre bore and need the pressed shims to mount the horn buttons, which are still made to suit the original smaller centre bore)? I am presuming that the horn works with the original wheel, meaning that it is just a simple set up problem.
Youd think that it would be simple but it can be confusing, with Lucar connectors on the spacers and some horn buttons having two connectors too, and only one wire from the horn ring on the base of the boss. It is usually best to get the horn working off the button in your hand and then fitting the hub, and transferring it into the wheel in stages.
Did you buy the Boss new or are you relying on someone elses description? In my experience many vendors write 924/944/968/(828 even, sometimes!) with little idea what really fits what. If you are certain that the boss suits an oval dash 944 then there wont be any risk of melting anything.
Can you take a photo of the horn ring, and pressed metal spacers used to mount the horn button and the wire (most Momo wheels other than a Prototipo use a later larger centre bore and need the pressed shims to mount the horn buttons, which are still made to suit the original smaller centre bore)? I am presuming that the horn works with the original wheel, meaning that it is just a simple set up problem.
Youd think that it would be simple but it can be confusing, with Lucar connectors on the spacers and some horn buttons having two connectors too, and only one wire from the horn ring on the base of the boss. It is usually best to get the horn working off the button in your hand and then fitting the hub, and transferring it into the wheel in stages.
Its always hard to help people like this because you cant know what they know, or what they've done or omitted.
As suggested above: first you get the horn working by shorting the wire to earth - its the earth circuit that youre making here.
All the button is, is a temporary push to make switch, so if you connect the wire to the button/switch, you have to ensure that the button/switch is then grounded securely when its fixed to the wheel. If it isn't then the circuit cant be completed, whether you push the button or not.
As suggested above: first you get the horn working by shorting the wire to earth - its the earth circuit that youre making here.
All the button is, is a temporary push to make switch, so if you connect the wire to the button/switch, you have to ensure that the button/switch is then grounded securely when its fixed to the wheel. If it isn't then the circuit cant be completed, whether you push the button or not.
Does the original wheel/horn push work?
Have you tried with the boss only fitted, with the horn push in your hand connected to the wire from the boss and earthed (exposed metal wire spring to steering shaft)?
As Ive said before, get it working in your hand then when you understand whats doing what its far easier to get it working in-situ.
Have you tried with the boss only fitted, with the horn push in your hand connected to the wire from the boss and earthed (exposed metal wire spring to steering shaft)?
As Ive said before, get it working in your hand then when you understand whats doing what its far easier to get it working in-situ.
I believe the 944 and 964 are very similar when fitting momo steering wheels. Same boss I believe. With a 964 there is only one connection to the horn as shown in the pic above. But you also need the horn contact switch fitting to the steering column assembly. See link below to what it looks like:
http://www.design911.co.uk/fu/prod1177/Steering-Wh...
This provides the contact to the brass ring on the bottom of the momo boss.
http://www.design911.co.uk/fu/prod1177/Steering-Wh...
This provides the contact to the brass ring on the bottom of the momo boss.
Gassing Station | Front Engined Porsches | Top of Page | What's New | My Stuff