[Healeys] Polarity
Harold Manifold
manifold at telus.net
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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