The largest and best supported Jaguar cars enthusiast site on the Internet!

Serving Enthusiasts since 1993
The Jag-lovers Web

Currently with 3,166 members

Jag-lovers' Ebooks
- Jag-Lovers' Saloons Ebook -

7.4.3 - Overdrive Reverse Lockout Information ( Pual Saltwick,  April 23, 2003 )

There is no relay or reverse lock-out on the factory 420/S OD wiring.
The solenoid on the gearbox gets its power from the same source as
the reverse switch (before contacts), but it is irrelevant to the circuit.
The power goes from the reverse light switch terminal, through the 4th
gear switch (if closed by being in 4th gear), through an in-line fuse,
through the column mounted OD switch, and onto the solenoid.
It would have been easy for the factory to wire a relay through the reverse
switch, but they chose to just print a warning "Don't reverse with the OD
engaged " in the manual. Make sure you put an in-line fuse between the 4th
gear switch and the column ("ON") switch, the solenoid is a two coil device
that can draw 20 amps when it fails.


sepbar.jpg (3094 bytes)

This section currently maintained by Pascal Gademer; questions, comments, submissions and suggestions, email


Please help support the move to the new site, and DONATE what you can.
A big Thank You to those who have donated already!



Go to our Homepage
Improve your Jag-lovers experience with the Mozilla FireFox Browser!

  View the latest posts from our Forums via an RSS Feed!

Jag-loversTM Ltd / JagWEBTM 1993 - 2024
All rights reserved. Jag-lovers is supported by JagWEBTM
For Terms of Use and General Rules see our Disclaimer
Use of the Jag-lovers logo or trademark name on sites other than Jag-lovers itself in a manner implying endorsement of commercial activities whatsoever is prohibited. Sections of this Web Site may publish members and visitors comments, opinion and photographs/images - Jag-lovers Ltd does not assume or have any responsibility or any liability for members comments or opinions, nor does it claim ownership or copyright of any material that belongs to the original poster including images. The word 'Jaguar' and the leaping cat device, whether used separately or in combination, are registered trademarks and are the property of Jaguar Cars, England. Some images may also be Jaguar Cars. Mirroring or downloading of this site or the publication of material or any extracts therefrom in original or altered form from these pages onto other sites (including reproduction by any other Jaguar enthusiast sites) without express permission violates Jag-lovers Ltd copyright and is prohibited
Go to our Homepage
Your Browser is: CCBot/2.0 (, IP Address logged as on 15th Apr 2024 08:40:08