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

49 F1 Negative Ground?

 
  #1  
Old 02-13-2011, 02:45 PM
CrazyDog66's Avatar
CrazyDog66
CrazyDog66 is offline
Freshman User
Thread Starter
Join Date: Feb 2011
Location: Denver Colorado
Posts: 30
CrazyDog66 is starting off with a positive reputation.
49 F1 Negative Ground?

I finally got to mess around with my new truck.
As I was removing the old 6v battery, I noticed that the PO had the positive cable hooked to the starter solenoid and the negative hooked up the block near the coil. I thought these old trucks were positive ground.
What should i do when I get a new battery, what problems would I encounter if it is hooked up wrong?
The PO also said it has a 3 spd but it is obviously a 4 spd.

Thanks for your help.
Randy
 
  #2  
Old 02-13-2011, 03:22 PM
NumberDummy's Avatar
NumberDummy
NumberDummy is online now
Ford Parts Specialist
Join Date: Nov 2006
Location: Simi Valley, CA
Posts: 82,535
NumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputation
Thru 1955: 6V positive ground / 1956 thru today: 12V negative ground.

If the battery is hooked up bassackwards, the ammeter will show a negative discharge.
 
  #3  
Old 02-13-2011, 03:33 PM
mtflat
mtflat is offline
Post Fiend
Join Date: Oct 1999
Location: Kalispell, MT
Posts: 5,438
mtflat has a good reputation on FTE.mtflat has a good reputation on FTE.mtflat has a good reputation on FTE.
It's possible your po converted to 6v neg ground. Look at the coil and see which terminal the wire is on that connects to the distributor body. (-) terminal means it's neg ground. (+) terminal means it's pos ground.

Otherwise, as Bill said, fire it up and see what the ammeter says. Keep in mind the rpm's need to be up for anything to show. At idle with a stock system should show a discharge, only moving to charge at around 1200 rpm.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Speedymaru
1973 - 1979 F-100 & Larger F-Series Trucks
2
07-10-2016 12:54 PM
GM4WALLS
1973 - 1979 F-100 & Larger F-Series Trucks
6
03-04-2016 10:27 AM
phathom
Electrical Systems/Wiring
12
09-08-2014 09:29 AM
jruggles
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
2
04-20-2014 12:42 PM
brkellogg
1948 - 1956 F1, F100 & Larger F-Series Trucks
16
10-02-2012 09:04 PM


Thread Tools
Search this Thread
Quick Reply: 49 F1 Negative Ground?


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.