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If you have a Pertronix or other electronic ignition, you'll need to change that.
Tom
thanks what happens if my tach hasn't been working when it is positive do we still have to change anything when we change to negative ground???? Just asking.
when you say change the Pertronix or other electronic ignition do you mean the whole thing or can we just change the ignitor inside the electronic distributor
Here's another useful link:
http://www.askthemechanic.co.uk/classic-cars/sunbeam-alpine/negative-earth.html
It notes to swap the leads on the coil - good idea
And it also notes to swap the wires on the cigar lighter. Hmmmm. Had not thought of that. No need to do so for use as cigar lighter, but most uses today are for plugging in a GPS, phone charger, etc. And for that I think it MAY require a change, but that needs some investigation. Near as I can tell, the original wiring on Pos earth Alpines (SI thru SIV) have Pos on the shell (i.e. GND) which would make them not work for just about any modern accessory. So changing car polarity would solve that- UNLESS someone had previously swapped the wires on their Pos Earth car to work with modern accessories.
Tom
I have chatted with Technical Support at Delran. They suggest using one of their female cigarette charger accessories which connects directly to the battery, red to the positive post and black to the negative post, and I can charge my phone and or GPS. Any thoughts?
Barry,
I purchased a charger/voltmeter and installed it in a small wooden box inside the front of the armrest.
It was wired as per your suggestion, with a 7.5 amp fuse, using insulators and taking all the precautions to prevent a short circuit.
The results are very good, giving me a voltage reading and a way to charge two instruments, which is "hidden" under the armrest cover.
I did take a few pictures, but would have to learn to paste them to my comments.