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Fixed price repairs are based on the assumption that unit/s received
are ‘original & complete’... a surcharge may be applied to cover
missing parts etc... If in doubt send in the unit for inspection
‘Good luck with your project’... Enjoy your classic motoring...
If you found this web site via a ‘search engine’ please
check that you are looking @ the latest version... click here
If you found this web site via a ‘search engine’ please
check that you are looking @ the latest version... click here
Jaguar XK 120 ( 1948 / 54 )
561.1 M
Payment options
JDO Instruments
Classic Car Instrument Repairs ( Est 1963 )
Fixed price repairs for most British & European Classic Car Instruments
48hr service available... Why pay more & wait longer ! No UK vat
Tele: 01535 603570 / Mobile: 07872 071512
Please check the FAQ’s page BEFORE ringing / texting / emailing
WE ARE STILL OPEN ( for postal work only )
Classic Car Instrument Repairs ( Est 1963 )
Fixed price repairs for most British & European Classic Car Instruments
48hr service available... Why pay more & wait longer ! No UK vat
Tele: 01535 603570 / Mobile: 07872 071512
Please check the FAQ’s page BEFORE ringing / texting / emailing
WE ARE STILL OPEN ( for postal work only )
Connecting diagrams... Smiths & UK Jaeger Rev-Counters
Type RVI v1
A
B
C
Positive OR Negative Earth*
A= Ignition feed - ve .. (+ ve)*
B= Coil - ve . (+ ve)*
C= Ignition feed - ve (+ ve)*
Case to be earthed + ve ( - ve )*
If unit fails to work REVERSE
A & B connections
These units will not work
with Electronic ignition
upgrade available
(See picture @ top R/H side
For ‘current loop’ info)
A= Ignition feed -
B= Coil -
C= Ignition feed -
Case to be earthed + ve ( -
If unit fails to work REVERSE
A & B connections
These units will not work
with Electronic ignition
upgrade available
(See picture @ top R/H side
For ‘current loop’ info)
A
B
Type RVI v2
Normally Negative Earth*
A= Male bullet Ign +ve
B= Female bullet coil +ve
C= Ignition feed + ve
Case to be earthed -ve
* A few early units were
Positive Earth
These units will not work with Electronic ignition
upgrade available
A= Male bullet Ign +ve
B= Female bullet coil +ve
C= Ignition feed + ve
Case to be earthed -
* A few early units were
These units will not work with Electronic ignition
upgrade available
C
Type RVC
A
B
Negative Earth only
A= Male bullet Coil - ve
B= Ignition feed +ve
( positions may vary )
Case to be earthed -ve
These units will work
with Points OR
Electronic ignition
Some Jaguar units may be fitted with a lead
& a 3 or 4 pin plug
A= Male bullet Coil -
B= Ignition feed +ve
( positions may vary )
with Points OR
Electronic ignition
Some Jaguar units may be fitted with a lead
& a 3 or 4 pin plug
A= Camshaft generator
B= Camshaft generator
( either way round )
Case to be earthed
( for illumination only )
These units can be
Upgraded to work with
Points OR Electronic
ignition
B= Camshaft generator
( either way round )
Case to be earthed
( for illumination only )
These units can be
Upgraded to work with
Points OR Electronic
ignition
A
B
Type RV
Current loop
( 1 full turn )
( 1 full turn )
Positive OR Negative Earth*
A= Ignition feed -ve (+ ve)*
B= to coil -ve (+ ve)*
Case to be earthed +ve ( -ve)*
( for illumination only )
If unit fails to work REVERSE
A & B connections
These units will not work
with Electronic ignition
upgrade available
(See picture @ top R/H side
For ‘current loop’ info)
A= Ignition feed -
B= to coil -
Case to be earthed +ve ( -
( for illumination only )
If unit fails to work REVERSE
A & B connections
These units will not work
with Electronic ignition
upgrade available
(See picture @ top R/H side
For ‘current loop’ info)
A
B
12v -ve
6v -ve
+ve
Type RVI v1 ‘Universal 80mm unit’
RVI version 1... It is important to retain the nylon block correctly with the metal
clip
& loop the ‘pulse lead’ as shown otherwise the unit will not work
For other Smiths / UK Jaeger instruments
Connections... CLICK HERE