|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
03-13-2017, 05:07 PM | #1 |
Member
Join Date: May 2011
Location: raymond n.h
Posts: 61
|
6 to 12 volt horn
I need some help from someone who has gone from 6 to 12 volt and changed polarity to neg. I can get my horns to work but not off the three terminal relay.I have insulated the horns that may be a problem.
s terminal to horn button h terminal horns b terminal to pos on battery this is a 41 ford with trumpet horns not sure what I am doing wrong. Before I insulated the horns I was having the same problem.Because I changed polarity my wires that use to be live are now negative any help would be great thanks paul |
03-13-2017, 05:18 PM | #2 |
Senior Member
Join Date: May 2010
Location: Star, MS
Posts: 4,024
|
Re: 6 to 12 volt horn
With one wire going to the horn, the only way to complete the circuit is to have the horn body connected to the car chassis. You might have other problems, but without the horn grounded it can't work. Are you sure the relay is working? Put a test light or volt meter on the connector at the horn. Does it show voltage when the horn button is mashed? Test for voltage at the "B" Terminal of the relay. It should be hot all the time.
|
Sponsored Links (Register now to hide all advertisements) |
|
03-13-2017, 05:24 PM | #3 |
Senior Member
Join Date: Oct 2015
Location: Socal
Posts: 795
|
Re: 6 to 12 volt horn
Had to put a second horn in on my truck when I went to 12v.
Wired them in series. |
03-13-2017, 07:18 PM | #4 |
Member
Join Date: May 2011
Location: raymond n.h
Posts: 61
|
Re: 6 to 12 volt horn
Thank for the response I will check for voltage at b terminal wont be till weekend. Yes I did check horn button to s terminal and it works with a voltmeter. Correction I went from battery to button and it worked
|
03-13-2017, 09:50 PM | #5 |
Senior Member
Join Date: Oct 2013
Location: Glens Falls NY
Posts: 1,267
|
Re: 6 to 12 volt horn
I gather you do have two horns so I also think you have a grounding problem. The horns must be grounded to the car body. No big deal but did you change the relay to a 12 volt (i.e. a 1956 Ford). Regarding voltage, some don't worry about 6v vs. 12v if there's just incidental usage. Its continuous and/or long-term usage that could cause damage.
Also, if you're using two horns, wiring them in series creates some conflicting electronic problems as the vibrators in each tend to fight each other, usually to the detriment to the second horn in-line. |
03-13-2017, 11:45 PM | #6 |
Senior Member
Join Date: May 2010
Location: Lower Hutt , New Zealand
Posts: 2,126
|
Re: 6 to 12 volt horn
Sponsored Links (Register now to hide all advertisements)
GB
__________________
"you can't make honey out of dog sh*t" "You're a long time looking at the lid" |
03-14-2017, 04:12 PM | #7 |
Member
Join Date: May 2011
Location: raymond n.h
Posts: 61
|
Re: 6 to 12 volt horn
yes duel trumpets I have been working on this car off and on for the last few years.As I have been thinking I had these horns off and painted them.I forgot I did that. I also am leaning towards a ground.I do have the 6 volt relay I was told it still may work? This week end I will try it out instead of taking these off again I will just run a good ground wire to chassis.
|
03-14-2017, 04:53 PM | #8 |
Senior Member
Join Date: May 2010
Location: H.B. So. Calif
Posts: 411
|
Re: 6 to 12 volt horn
I agree with DRBrown.
|
03-31-2017, 08:04 AM | #9 |
Senior Member
Join Date: May 2010
Location: 74FL
Posts: 323
|
Re: 6 to 12 volt horn
It should have been 'plug and play' - there really is no difference - neither the horns nor the relay care about polarity.
The 6V horn relays have heavier internal contacts and are better suited for the higher current draw when running early horns on 12V. My favorite horns were a pair of '51 F1 Trumpets on 12V - angry sounding!
__________________
Daddy always said, "If yer gonna be dumb, you gotta be tough" and I'm one tough sumbitch! T5 Tech |
03-31-2017, 10:45 AM | #10 |
Senior Member
Join Date: Sep 2014
Location: Sask. Canada
Posts: 2,424
|
Re: 6 to 12 volt horn
Yes, when I tested my 52 Merc horns (off the car) on 12 volts , they worked, and loud! On 6 volts I could not get more than a click out of one horn. A few blasts on 12 volts seemed to clear it up and now I'm back to working them both on 6 volts. Yes, grounding is essential but I don't think it matters if positive or negative ground.
__________________
https://www.youtube.com/user/roosty6/videos |
|
|
Sponsored Links (Register now to hide all advertisements) |
|