Print Page - Positive or Negative earth?

Title: Positive or Negative earth?
Post by: oorwullie on 18 Dec, 2018, 13:16

Hi all,
I'm new to the forum, so please forgive me if this is a stupid question!
I have a 1956 B31 in boxes,as a project.
I'm buying bits as I go along, and went to order a new wiring loom.
The site I went to order from asked if it was positive or negative earth?
So, how do I know? The original loom is missing, do I order a negative loom and hope for the best?
Any advice would be great!!

Cheers Wullie

Title: Re: Positive or Negative earth?
Post by: JulianS on 18 Dec, 2018, 14:44

1956 would originally be positive earth.

Title: Re: Positive or Negative earth?
Post by: oorwullie on 18 Dec, 2018, 16:20

Thanks for the information!
Think I will order the positive loom.
What that effect anything if you wanted to upgrade to 12 volt?

Cheers Wullie

Title: Re: Positive or Negative earth?
Post by: Mark B on 20 Dec, 2018, 12:06

Just to make things less certain, my '53 rigid B31 is negative earth, 6v. But maybe that's when they changed polarity.

Title: Re: Positive or Negative earth?
Post by: STAR TWIN on 20 Dec, 2018, 14:32

The 6 volt positive earth wiring loom is just fine should you decide to go for 12 volts. I presume you have an E3L dynamo.

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The BSA Workshop => Singles => Topic started by: oorwullie on 18 Dec, 2018, 13:16