 Why doesn't my horn base plate have a tab for the ground? |
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| GeorgeKopf |
 Jun 3 2025, 08:06 AM
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#1
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Member  Group: Members Posts: 214 Joined: 9-February 21 From: Princeton, NJ Member No.: 25,186 Region Association: MidAtlantic Region  |
I'm assembling my horn pad and can't find a place to connect the brown ground wire from the contact ring. Do I have the wrong base plate?
   I think this is what it is supposed to look like:  And the PET Parts List for a 1974 doesn't show the contact pin:  Thanks. George |
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| Chad911sc |
Jun 3 2025, 09:06 AM
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#2
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Member Group: Members Posts: 143 Joined: 24-September 24 From: Florida Member No.: 28,374 Region Association: South East States |
I don’t have a factory steering wheel, so not sure about the original design, but you could just crimp a metal loop end piece on your ground wire and slide one of the three bolts through it. That will give you the same result easily.
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| Graydingo |
Jun 3 2025, 09:40 AM
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#3
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Member Group: Members Posts: 75 Joined: 12-August 22 From: Las Vegas Member No.: 26,768 Region Association: Southwest Region |
(could be wrong on this, but basing this off 911 stock setup)
The black wire from the fuse panel makes the horn sound when it's grounded. Unlike an aftermarket MOMO you don't use a second wire because the stock horn button is a pad that is spring loaded. When you depress the horn pad, it contacts the metal ring and grounds it. The horn wire connects to the pad, then the pad touches the metal of the column grounding it and sounding the horn. |
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| Chad911sc |
Jun 3 2025, 11:42 AM
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#4
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Member Group: Members Posts: 143 Joined: 24-September 24 From: Florida Member No.: 28,374 Region Association: South East States |
Ah makes sense. I have a Momo and mine does have two wires. Never seen the stock set up in the car, but that sounds right.
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| ClayPerrine |
Jun 3 2025, 02:23 PM
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#5
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Life's been good to me so far..... Group: Admin Posts: 16,386 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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70-71 fours had a contact wiper pin like a 914-6. So there was no wire. Later fours got a different setup with the wire. So early horn rings didn't have a place to attach a wire.
Early four setup... see item 11  Late 4 setup... see item 4  The late setup matched the VW production at the time. |
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| GeorgeKopf |
Jun 3 2025, 08:37 PM
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#6
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Member Group: Members Posts: 214 Joined: 9-February 21 From: Princeton, NJ Member No.: 25,186 Region Association: MidAtlantic Region |
QUOTE(ClayPerrine @ Jun 3 2025, 02:23 PM)  early horn rings didn't have a place to attach a wire. Ahhh. So, I must have an early horn ring. That explains everything. I'm going to try what Chad911sc suggested and attach the ground to one of the three bolts. Thank you everybody! I love this forum and the people here. (IMG:style_emoticons/default/icon12.gif) George |
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| GeorgeKopf |
Jun 8 2025, 07:30 PM
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#7
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Member Group: Members Posts: 214 Joined: 9-February 21 From: Princeton, NJ Member No.: 25,186 Region Association: MidAtlantic Region |
Epilog,
It turns out that the early horn base is insulated from the three bolts by little plastic spacers. So, I used my Dremel tool to cut a tab to fit a standard spade terminal.    The horn now works great. Thank you to everybody! George |
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| Steve |
Jun 9 2025, 12:03 PM
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#8
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914 Guru Group: Members Posts: 5,877 Joined: 14-June 03 From: Laguna Niguel, CA Member No.: 822 Region Association: Southern California
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Here’s a picture of my stock 1975 wheel. It has a spade on one of the screws.
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| ClayPerrine |
Jun 10 2025, 05:21 AM
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#9
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Life's been good to me so far..... Group: Admin Posts: 16,386 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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QUOTE(Steve @ Jun 9 2025, 01:03 PM) Here’s a picture of my stock 1975 wheel. It has a spade on one of the screws. That spade is mounted to the screw, not the horn ring. If you hook that to the horn wire, the horn is going to sound all the time. |
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