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#91636 02/09/2005 2:13 AM | Joined: Jul 2003 Posts: 141 Member | | Member Joined: Jul 2003 Posts: 141 | I converted to 12V a few weeks ago as part of the rebuild of my '52. I just got around to troubleshooting my horn and have made an interesting discovery. The horn would work for about 2 to 4 honks of 1 second each, then stop working. I traced the problem to the little cylinder that goes between the horn backing ring and the steering column. That piece has a spring inside to keep contact with the 2 locations mentioned above. The spring would get too hot and loose it's "spring" and collapse! The '52 did not use a relay and apparently 6 volts was OK, but not 12. Looks like I'll be rigging up a relay operation.
shoeless | | |
#91637 02/09/2005 4:16 AM | Joined: Apr 2002 Posts: 1,571 Shop Shark | | Shop Shark Joined: Apr 2002 Posts: 1,571 | Shoeless, I may be wrong, but i always thought the 6v spring looked to be about the same size as the later 12v springs. Maybe one of those would get you going again. The relay isn't a bad idea, either. | | |
#91638 02/09/2005 4:10 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Wire a relay in it. There is to much curent for the horn button. 
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#91639 02/10/2005 12:51 AM | Joined: Jul 2003 Posts: 141 Member | | Member Joined: Jul 2003 Posts: 141 | Installed a relay today from Radio Shack that isolates the coil from the relay contacts. That was good medicine! | | |
#91640 02/10/2005 6:09 PM | Joined: Nov 2000 Posts: 44 Junior Member | | Junior Member Joined: Nov 2000 Posts: 44 | I guess I'll have to do the same or does the resistor between the ignition coil and ignition make up for the relay? | | |
#91641 02/11/2005 3:38 AM | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Originally posted by crow:
I guess I'll have to do the same or does the resistor between the ignition coil and ignition make up for the relay? No that resistor has nothing to do with the horn or lights or such. The resister limits current across the points. Otherwise the current will quickly burn the points. If you don't have a horn relay you need one.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | |
#91642 02/11/2005 9:08 AM | Joined: May 2001 Posts: 477 Shop Shark | | Shop Shark Joined: May 2001 Posts: 477 | he's right. do the relay. it's easy wiring. a couple of bucks at the auto parts. | | |
#91643 02/11/2005 9:41 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Yet I'm still running my old 6 volt horn system on 12 volts with no problems. Going on 5 years and 20,000 miles now.
Fred
52 3600
69 C-10
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