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rehab1964
 Post subject: Elecy techy question
PostPosted: Wed Sep 30, 2009 6:29 pm 
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Ok, this may be a very stupid question........

My Princess is positive earth and has a cigarette lighter, I can't run my sat nav in said lighter socket as it blows the inline fuse (presumably becasue the sat nav in negative earth)

Is there any sort of "inverter" I can use to convert the positive earth power coming out of the cigarette lighter to negative earth for the sat nav?

I realise I could change the car to negative neart but would prefer not to do that as at present everything works very nicely and I don't want to tempt fate

cheers

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mini maxx
 Post subject:
PostPosted: Wed Sep 30, 2009 6:37 pm 
MELWAYS :lol:
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rehab1964
 Post subject:
PostPosted: Wed Sep 30, 2009 6:42 pm 
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mini maxx wrote:
MELWAYS :lol:


won't tell me how fast I'm going, in these cash strapped times when speed cameras are revenue raisers I'd like to have a slightly more accurate idea of how fast I'm going than my speedo provides

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'62 Morris 850 (Marion)
'65 Mini Delux - sleeper 1275/S discs (Ms Plum)
'69 Vanden Plas Princess 1300
'71 Wolseley 1300
'74 Austin 1300 Countryman
'94 XJ6 Sport 3.2
'04 Rover 75 CDTi
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Morris 1100
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PostPosted: Wed Sep 30, 2009 6:45 pm 
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If the cigarette lighter is not mounted to the steel body (like the wooden dash) you could just swap the wires in the back of it.
Another way is to make an extension lead that plugs in to the lighter and you swap the wires on the extension plug so that you have the positive in the centre.
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niceboy1275
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PostPosted: Wed Sep 30, 2009 6:46 pm 
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Kev, the princess has what, 4 cows worth of leather interior and about 6 trees worth of timber trimming? I think she'd take a while to wind up to an illegal speed... put the nav in that hot rod of a wolsely! :D

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850man
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PostPosted: Wed Sep 30, 2009 6:49 pm 
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Just turn the Battery around and make it negitive earth. problem solved, ill be at the bar if you need me...

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mini maxx
 Post subject:
PostPosted: Wed Sep 30, 2009 6:49 pm 
rehab1964 wrote:
mini maxx wrote:
MELWAYS :lol:


I'd like to have a slightly more accurate idea of how fast I'm going than my speedo provides

But isnt that part of owning a classic car :wink:
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rehab1964
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PostPosted: Wed Sep 30, 2009 7:43 pm 
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Morris 1100 wrote:
If the cigarette lighter is not mounted to the steel body (like the wooden dash) you could just swap the wires in the back of it.
Another way is to make an extension lead that plugs in to the lighter and you swap the wires on the extension plug so that you have the positive in the centre.


So I wouldn't need to earth an extension lead? that sounds like it would work! thanks

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'62 Morris 850 (Marion)
'65 Mini Delux - sleeper 1275/S discs (Ms Plum)
'69 Vanden Plas Princess 1300
'71 Wolseley 1300
'74 Austin 1300 Countryman
'94 XJ6 Sport 3.2
'04 Rover 75 CDTi
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rehab1964
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PostPosted: Wed Sep 30, 2009 7:44 pm 
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niceboy1275 wrote:
Kev, the princess has what, 4 cows worth of leather interior and about 6 trees worth of timber trimming? I think she'd take a while to wind up to an illegal speed... put the nav in that hot rod of a wolsely! :D


it's the down hill runs that kill us!

as for the Wolseley, it has no speedo at all these days

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'62 Morris 850 (Marion)
'65 Mini Delux - sleeper 1275/S discs (Ms Plum)
'69 Vanden Plas Princess 1300
'71 Wolseley 1300
'74 Austin 1300 Countryman
'94 XJ6 Sport 3.2
'04 Rover 75 CDTi
Top
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