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MartinC
Joined: 27 Jun 2009 Posts: 97
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Posted: Fri Apr 15, 2011 5:35 pm Post subject: changing earth polarity |
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I may need to change from positive earth to negative.
There's no fancy electrics to bother about.
Can someone remind me of the procedure to follow with the dynamo please?
Although I did once connect a car battery backwards and converted the dynamo just from starting the engine! _________________ 1937 Standard Flying Twelve
1942 Bedford OYD
1947 Cadillac Fleetwood Sixty-Special
1954 Hillman Minx
1956 Austin A30
1957 Vauxhall Victor Super
1960 Car Cruiser Carousel caravan
1962 Car Cruiser Carissima caravan |
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peter scott
Joined: 18 Dec 2007 Posts: 7119 Location: Edinburgh
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Posted: Fri Apr 15, 2011 6:33 pm Post subject: |
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Hi Martin,
Just disconnect the F and D terminals on the dynamo, connect them together and briefly touch them onto the positive battery terminal and it should start up when you reconnect them as before.
If you have an SU fuel pump do check that there isn't a spark arresting diode connected across the contacts (Remove the Bakelite cover to see it.)
Peter _________________ http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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Phil - Nottingham
Joined: 01 Jan 2008 Posts: 1252 Location: Nottingham
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Posted: Fri Apr 15, 2011 8:05 pm Post subject: |
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Coil and ammeter need doing as well and possibly clock. Loads on this in SEARCH _________________ Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2 |
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MartinC
Joined: 27 Jun 2009 Posts: 97
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Posted: Fri Apr 15, 2011 9:50 pm Post subject: |
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Thanks Peter,
As I said Phil, there's no electrics to bother about. I'll do the coil of course (although they do work fine connected in reverse), there's no clock, no ammeter, no SU pump. _________________ 1937 Standard Flying Twelve
1942 Bedford OYD
1947 Cadillac Fleetwood Sixty-Special
1954 Hillman Minx
1956 Austin A30
1957 Vauxhall Victor Super
1960 Car Cruiser Carousel caravan
1962 Car Cruiser Carissima caravan |
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Phil - Nottingham
Joined: 01 Jan 2008 Posts: 1252 Location: Nottingham
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Posted: Fri Apr 15, 2011 11:07 pm Post subject: |
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Depending on terminal type these may have to be replaced or swapped over _________________ Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2 |
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Jim.Walker
Joined: 27 Dec 2008 Posts: 1229 Location: Chesterfield
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Posted: Sat Apr 16, 2011 4:40 pm Post subject: |
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Don't know what car we are talking about, but if it is late enough to have any permanent magnet motors such as heater or wiper they will run backwards. Wipers will still work, but the parking cam in the motor will be running contrary to its design profile and will probably fail eventually.
Wound field motors will work as before. _________________ Quote from my late Dad:- You only need a woman and a car and you have all the problems you
are ever likely to want". Computers had not been invented then! |
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