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Positive or negative
https://forums.tipec.net/viewtopic.php?f=4&t=18571		 Page 1 of 1
Author:  Marlin47 [ Fri Sep 19, 2014 1:02 pm ]
Post subject:  Positive or negative
1961 Ford Anglia 105 E. Negative or positive earth ?

Cheers.
Author:  tr7v8 [ Fri Sep 19, 2014 1:33 pm ]
Post subject:  Re: Positive or negative
Positive unless it has been converted which is quite likely. Easiest way is to check the battery earth lead.
Author:  Marlin47 [ Fri Sep 19, 2014 1:42 pm ]
Post subject:  Re: Positive or negative
Er, check it for what ? To see if it's live ? If the minus lead goes to the car body for an earth, does that make it negative ?

Do you know, I once took a Jaguar "E" Type engine out of the car in a garage without any electricity ( a lock up in Battersea )' but I blench when dealing with electrics. It gets worse as one gets older !
Author:  tr7v8 [ Fri Sep 19, 2014 1:57 pm ]
Post subject:  Re: Positive or negative
Marlin47 wrote:
Er, check it for what ? To see if it's live ? If the minus lead goes to the car body for an earth, does that make it negative ?


Exactly! If the lead attached to the body is the neg then it is negative earth & vice versa. It will have been build positive earth but reasons for changing are commonly 1. fitting modern radios &/or 2. Fitting an alternator to improve the charging system.
There were positive earth alternators but they're as rare as rockin-'orse poo.
Author:  Marlin47 [ Fri Sep 19, 2014 2:18 pm ]
Post subject:  Re: Positive or negative
Great ! You've been very helpful. Thank you. What about charging the battery if it's flat, though ?

Does the minus charger crocodile clip clamp to the minus battery terminal and ditto the positive ?
Author:  sam [ Fri Sep 19, 2014 2:26 pm ]
Post subject:  Re: Positive or negative
yes
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