[Healeys] Polarity

Sat Mar 7 10:21:21 MST 2020

Here is another article on reversing polarity for BMC cars.

Harold

  _____  

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of i erbs
Sent: Saturday, March 07, 2020 8:30 AM
To: Kees Oudesluijs
Cc: Ahealey help
Subject: Re: [Healeys] Polarity

What about tachometers? 

Ira Erbs
Portland,OR
1959 Austin Healey BN4
1967 MGB

On Sat, Mar 7, 2020, 6:00 AM Kees Oudesluijs <coudesluijs at chello.nl> wrote:

The original pumps had a capacitor over the points which made them dual
polarity. At a later stage SU changed the capacitor for a diode which made
the pump polarity sensitive. If you remove the diode and fit a transil over
the points the pump becomes dual polarity.

The very early pumps with the single points may not have had any capacitor
or diode fitted, which would lead to spark erosion of the points. These were
also dual polarity.

The later electronic/solid state versions are all polarity sensitive.

Kees Oudesluijs

Op 7-3-2020 om 14:49 schreef David P:

SU fuel pumps are generally polarity sensitive...

On 3/7/2020 1:18 AM, Kees Oudesluijs wrote:

In addition to the article:

-Change polarity to the radio if fitted. Some older radio's have a polarity
switch.

-Check if clock is polarity sensitive. Some older Smiths/Jaeger clocks are
dual polarity. Later ones are polarity sentive.

-Change over the wires from the Amp gauge.

Kees Oudesluijs

Op 7-3-2020 om 04:48 schreef Max Byers:

See attachment.

Steve Byers

HBJ8L/36666

BJ8 Registry

AHCA Delegate at Large

Havelock, NC  USA

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of ahbn6---
via Healeys
Sent: Friday, March 6, 2020 9:32 PM
To: Healey List
Subject: [Healeys] Polarity

Is there any step by instructions on how to change to negative ground?

John Sims

www.healey6.com <http://www.healey6.com/> 

Matawan, NJ

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Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My
World go here: WWW.PORTERBIKES.COM/

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