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MG TD TF 1500 - Converting to negative earth

I wish to convert my TF to negative earth so that I can use an improved rev counter and a Cigar lighter socket to power various items like a mobile phone charger, an electric pump etc, also a lambda sensor to monitor fuel mixture.
I know that I will need a neg earth fuel pump but what else do I need to do??
Buuce Morgan

I checked the Archives for you and found the subject was covered in Sept 1997. It is pasted here for your reference.
Posted 23 September 1997 at 12:48:57 UK time
Barc in Cape Breton
Mike;
To change to negative ground is not a major task.
First you change the battery connections. Then you polarize
the generator by taking a short length of No 12 or14 wire
and'momentarily' connect terminals 'A'and'F' on the
voltage regulator. You get a large flash spark and a
reversed magnetic field in the generator.
Then with the battery ground disconnected, reverse the
connections on the ammeter, coil, inspectionn sockets on the
dash, and any electronic accessories[radio, CB].
Note, for correct spark direction the SW [or-]connection on
the coil is connected to the distributor for a negative
ground set up.
After all this mount an MGB 'This car wired for negative
earth' sign on the firewall next to the voltage regulator.
Hope this helps.
Safety fast, Barc

The only addition I can make is that the negative and positive posts of a battery are differnt diameters and the original helmet type battery cable connectors do not fit well and may have to be replaced with non-standard cables. The fuel pump will operate normally unless it has been electronically modified to use a transistor.
Jim Merz

This thread was discussed between 29/11/2001 and 30/11/2001

MG TD TF 1500 index

This thread is from the archive. The Live MG TD TF 1500 BBS is active now.