Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1948 - 1956 F1, F100 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-16-2014, 05:30 PM
Jacnat's Avatar
Jacnat Jacnat is offline
West Texas
 
Join Date: Jul 2014
Posts: 36
Jacnat is starting off with a positive reputation.
Newbie question: 6 volt vs. 12 volt system

Click the image to open in full size.
I'm the new proud owner of a 1950 F1. I am also a relative newbie at these old trucks and my mechanical knowledge is limited. I will probably have many questions in the coming days many of which will probably be just plain dumb. Here goes: when I bought the truck the battery was dead and wouldn't hold a charge. Before I took delivery the previous owner agreed to replace the old battery (it was dead and wouldn't hold a charge), which he did with a new 12 volt battery. He clearly didn't understand 6 volt versus 12 volt systems, but claims he was told by the guy at the auto parts store that this truck had been converted at some time from 6 volt to 12. I have cranked the truck a few times with the new battery and its working fine, but I know enough to know that IF the prior owner is wrong, and the truck has NOT been converted from 6 to 12 volts, I have the wrong battery and need to replace it with a 6 volt before doing damage to the truck. So the question is this: how do I determine if the truck is running on 6 volts or 12? Again, I apologize in advance for my ignorance but I'll never learn without asking and doing. Thank you in advance.

Last edited by Jacnat; 07-16-2014 at 05:37 PM. Reason: Added photo
Reply With Quote
  #2  
Old 07-16-2014, 05:38 PM
raytasch's Avatar
raytasch raytasch is offline
Old guy with old toys
 
Join Date: Jun 2004
Location: S.E. TN
Posts: 3,771
raytasch is a splendid one to beholdraytasch is a splendid one to beholdraytasch is a splendid one to beholdraytasch is a splendid one to beholdraytasch is a splendid one to beholdraytasch is a splendid one to beholdraytasch is a splendid one to behold
Welcome to FTE. Beautiful truck.
Does the truck have a generator or an alternator? If alternator, it has been converted.
Is the battery hooked positive to ground or negative to ground?
You've "cranked" the truck. Does the truck run?
__________________
Ray
1949 F-4 Built to drive--script bed.
1956 F350 Stock rebuilt script bed
2007 F150 SC. Driven once in a whle.
If there’s one thing that the government is highly skilled at, it is creating excessive amounts of bureaucracy and extra layers of red tape for people to wade through.
Reply With Quote
  #3  
Old 07-16-2014, 05:43 PM
Doc's Avatar
Doc Doc is offline
Postmaster
 
Join Date: Jun 2010
Location: East KY
Posts: 3,849
Doc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to behold
Multiple ways. Here's a few. Does the truck still have an original generator or an alternator? Pull out one of the rear tailight bulbs and tell us what number is stamped or printed on the bulb. Or better yet, show us a picture of the engine bay, and we'll probably be able to see something that will help us answer the question. It's not a stupid question at all. Welcome!
__________________
Shane
1949 F1, Stock / 1950 F-5
1950 F1, 302, AOD (still in a lot of pieces)
1997 F150 XLT, 4.6L
2008 F250 XLT, 6.4L Powerstroke
2011 Expedition EL
Reply With Quote
  #4  
Old 07-16-2014, 05:44 PM
Doc's Avatar
Doc Doc is offline
Postmaster
 
Join Date: Jun 2010
Location: East KY
Posts: 3,849
Doc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to behold
Ray beat me to it. Dang that is a pretty truck.
__________________
Shane
1949 F1, Stock / 1950 F-5
1950 F1, 302, AOD (still in a lot of pieces)
1997 F150 XLT, 4.6L
2008 F250 XLT, 6.4L Powerstroke
2011 Expedition EL
Reply With Quote
  #5  
Old 07-16-2014, 05:49 PM
Jacnat's Avatar
Jacnat Jacnat is offline
West Texas
 
Join Date: Jul 2014
Posts: 36
Jacnat is starting off with a positive reputation.
Guys thanks for the quick responses. I'll be home in 45 minutes and I'll shoot a few pictures under the hood. In answer to one question: the truck runs very smoothly. So good in fact I have had a hard time restraining myself from driving it before I can get it registered. Thanks again and more information and pics will follow shortly.
Reply With Quote
  #6  
Old 07-16-2014, 06:26 PM
Jacnat's Avatar
Jacnat Jacnat is offline
West Texas
 
Join Date: Jul 2014
Posts: 36
Jacnat is starting off with a positive reputation.
More pics.
Click the image to open in full size.


Click the image to open in full size.
Reply With Quote
  #7  
Old 07-16-2014, 06:31 PM
EffieTrucker's Avatar
EffieTrucker EffieTrucker is offline
Kentucky Chapter Member
 
Join Date: Jan 2011
Location: Eastern Kentucky
Posts: 1,514
EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.
Welcome to FTE!

There are no dumb questions here. This is one of the friendliest forums you'll ever find.

Having an alternator is usually a pretty good indicator that it has been converted to 12 volt, but not always. There are 6 volt, positive ground alternators. Likewise, there are 12 volt positive ground generators. So having a generator doesn't always mean it's still 6 volt.

The 6 volt alternators are usually very expensive and therefore kind of rare. I'm just saying it's a small possibility.

I think Doc is right. Checking the bulb numbers, or even checking to see if the coil or starter relay say 12 or 6 volt might tell the story. Some mechanics will also leave a list in the glove box telling what parts have been changed. For example: what brake pads fit a disk brake conversion.

If you have held the brake pedal for more than 30 seconds and the tail lights didn't burn out, you're probably good to go.

Note: No fair! You added pictures while I was typing.
__________________
“The rat rod is a whole lot of fun, in theory, until someone forces you to actually drive it.” - David Freiburger, Hot Rod Magazine

Kentucky Chapter Member

Last edited by EffieTrucker; 07-16-2014 at 06:57 PM. Reason: Added note.
Reply With Quote
  #8  
Old 07-16-2014, 07:38 PM
FortyNiner's Avatar
FortyNiner FortyNiner is offline
Posting Guru
 
Join Date: Jun 2011
Location: u-rah-rah Wisconsin
Posts: 1,566
FortyNiner has a great reputation on FTE.FortyNiner has a great reputation on FTE.FortyNiner has a great reputation on FTE.FortyNiner has a great reputation on FTE.FortyNiner has a great reputation on FTE.
What battery post is grounded to the block?

Note to FTE buds: sure looks like a stock generator to me.
Reply With Quote
  #9  
Old 07-16-2014, 07:50 PM
GLR's Avatar
GLR GLR is offline
Post Fiend
 
Join Date: Sep 2003
Location: NY and VA
Posts: 19,303
GLR has a superb reputationGLR has a superb reputationGLR has a superb reputationGLR has a superb reputationGLR has a superb reputationGLR has a superb reputationGLR has a superb reputationGLR has a superb reputationGLR has a superb reputationGLR has a superb reputationGLR has a superb reputation
Quote:
Originally Posted by FortyNiner View Post
What battery post is grounded to the block?

Note to FTE buds: sure looks like a stock generator to me.
Looks like neg. ground. Pos going to starter relay. Was looking for a ballast resistor.
__________________
[/SIGPIC]George 54 F100, 78 F150, 79 F150, 86 F250, 87 F250 Member #5 Boy you ain't Right Club Official Slackmaster #15
Reply With Quote
  #10  
Old 07-16-2014, 07:53 PM
Jacnat's Avatar
Jacnat Jacnat is offline
West Texas
 
Join Date: Jul 2014
Posts: 36
Jacnat is starting off with a positive reputation.
Tail light bulb says T1157 China 7H.
Reply With Quote
  #11  
Old 07-16-2014, 07:54 PM
EffieTrucker's Avatar
EffieTrucker EffieTrucker is offline
Kentucky Chapter Member
 
Join Date: Jan 2011
Location: Eastern Kentucky
Posts: 1,514
EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.
Quote:
Originally Posted by FortyNiner View Post
What battery post is grounded to the block?

Note to FTE buds: sure looks like a stock generator to me.
If you look at the top picture you can see the + on the top of the battery. It's running to the starter relay but it looks like the clamp was beat down onto the post.

I agree on the generator. It has an oil port for the rear armature shaft bushing. It's no guarantee, but I've never seen one on a 12v generator. That's just my experience, your mileage may vary.

Jacnat, I would be careful with the light bulbs until you figure it out.
Attached Images
 
__________________
“The rat rod is a whole lot of fun, in theory, until someone forces you to actually drive it.” - David Freiburger, Hot Rod Magazine

Kentucky Chapter Member
Reply With Quote
  #12  
Old 07-16-2014, 07:56 PM
EffieTrucker's Avatar
EffieTrucker EffieTrucker is offline
Kentucky Chapter Member
 
Join Date: Jan 2011
Location: Eastern Kentucky
Posts: 1,514
EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.EffieTrucker has a great reputation on FTE.
Quote:
Originally Posted by Jacnat View Post
Tail light bulb says T1157 China 7H.
That would be a 12v bulb.
__________________
“The rat rod is a whole lot of fun, in theory, until someone forces you to actually drive it.” - David Freiburger, Hot Rod Magazine

Kentucky Chapter Member
Reply With Quote
  #13  
Old 07-16-2014, 08:38 PM
Doc's Avatar
Doc Doc is offline
Postmaster
 
Join Date: Jun 2010
Location: East KY
Posts: 3,849
Doc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to beholdDoc is a splendid one to behold
Hey guys, where is the voltage regulator mounted on a six cylinder truck? I was voting 6 volt until he told us 1157 on that bulb. I agree with above. That sure looks like a stock 6 volt generator. Based on his story about the P.O., I don't think we can trust the position of the battery or how it's hooked up. Jacnat, can you stick your camera up under the dash and snap 2 or 3 pics of the wiring harness? Also, tell us if the wire running from the coil to the distributor is hooked to the negative or positive lug of the coil?
__________________
Shane
1949 F1, Stock / 1950 F-5
1950 F1, 302, AOD (still in a lot of pieces)
1997 F150 XLT, 4.6L
2008 F250 XLT, 6.4L Powerstroke
2011 Expedition EL
Reply With Quote
  #14  
Old 07-16-2014, 08:45 PM
Jacnat's Avatar
Jacnat Jacnat is offline
West Texas
 
Join Date: Jul 2014
Posts: 36
Jacnat is starting off with a positive reputation.
Hope this helps. Thanks guys.
Click the image to open in full size.


Click the image to open in full size.
Reply With Quote
  #15  
Old 07-16-2014, 08:46 PM
Jacnat's Avatar
Jacnat Jacnat is offline
West Texas
 
Join Date: Jul 2014
Posts: 36
Jacnat is starting off with a positive reputation.
Quote:
Originally Posted by EffieTrucker View Post

Jacnat, I would be careful with the light bulbs until you figure it out.
What do you mean by be careful? Thanks
Reply With Quote
Old 07-16-2014, 08:46 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1948 - 1956 F1, F100 & Larger F-Series Trucks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
1950 ford truck 6 volt or 12 volts beckman 1948 - 1956 F1, F100 & Larger F-Series Trucks 15 05-30-2012 05:47 PM
223 inline six 6 volt to 12 volt conversion HkyswiM 1948 - 1956 F1, F100 & Larger F-Series Trucks 10 11-16-2011 04:24 PM
Low Battery voltage varunner696 Electrical Systems/Wiring 9 07-12-2009 06:30 PM
Charging Problems - 1989 F-150 varunner696 1987 - 1996 F150 & Larger F-Series Trucks 16 07-10-2009 06:00 PM
Jump start 6 volt w/ 12 volt howefiretr 1948 - 1956 F1, F100 & Larger F-Series Trucks 5 01-28-2002 07:09 PM



All times are GMT -5. The time now is 02:55 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup