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J D O Instrument Engrs
Classic Car Instrument Repairs ( Est 1963 )
Tele: (UK) 01535 672125 Mobile / SMS: 07831 886545
Fixed price repairs for most British & European Classic Instruments
48 hr service available... Why pay more & wait longer ! no vat
48 hr service available... Why pay more & wait longer ! no vat
‘Good luck with your project’... Enjoy your classic motoring...
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
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
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check that you are looking @ the latest version... click here
Tip! Press F11 for a full page view @ 1024 x 768 screen resolution
press F11 again to revert to normal view contact the webmaster
Jaguar XK 120 ( 1948 / 54 )
708.1M
Payment options
Connecting diagrams... Smiths / 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
A= Male bullet Coil -
B= Ignition feed +ve
( positions may vary )
with Points OR
Electronic ignition
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