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' xj40 Ebook -

6.11.3 - Gauge / Warning Light Pack ( John Ping,  October 20, 2001 )

A word of caution, the gauges are precision devices and are easily damaged if handled in a careless manner. Ensure that your work area is clean including your hands. To access the Instrument Panel gauges, it is necessary to remove the Instrument Panel clear bezel. This step is accomplished by releasing the ten (five top and five bottom) plastic clips located on the gauge pack. With the ten clips removed, carefully separate the two housings.

Support the gauge pack in a manner such that the instruments are not touching any surfaces. With the gauge pack vertically supported, it is now necessary to remove the wood veneer panel. It is attached to the gauge pack with seven No. 1 Phillips head self-tapping screws. Fastener access is from the rear (printed circuit side) with two screws along the top, three screws in the middle section and two screws along the bottom. The Vehicle Condition Monitor (odometer) will release with the veneer panel. Ensure the four-pin black connector is released (pull upward) and the two odometer light bulbs are removed. Carefully separate the veneer panel from the gauge pack. Keep the gauge pack positioned vertically to ensure no instrument damage.

Remove any instrument as desired by first locating the mounting tabs for the affected instrument on the rear of the gauge pack. Press the small tabs to the right and left side of each pin to release the pin. This is precision work be careful! Each instrument has three pins. The ancillary gauges can be replaced independently, but the speedometer / tachometer is replaced as a single module.

Install the new gauge as desired by pressing the three pins into their circuit board female receivers. Carefully position and re-install the veneer panel using the seven small self-tapping screws. Carefully position and join the clear bezel housing to the gauge pack. It is wise to clean the inside and outside of the clear bezel using a glass cleaning solution prior to re-attachment with the gauge pack.

A quick check for electrical circuit continuity can be performed using a conventional digital multi-meter. Trace out the circuit path from each instrument pin to the printed circuit ribbon strip end. Each circuit should have minimal resistance. Mount the electronic pack to the rear of the gauge pack (hinge and clip mechanism). Carefully mount the three printed circuit ribbon strips to the connectors on the electronic pack. Ensure the ribbon strips are fully seated and the connector locks are properly positioned. Mount the electronic pack rear cover plate and you are finished.

Follow the directions for re-installing the instrument pack into the dash.

Note: If the tachometer fails for no apparent reason, it its possible the inline buffer resistor (approx. 6.8k ohms) between the negative side of the ignition coil and the Instrument Panel has failed (open circuit). All models may not incorporate this design, but absolutely check the wiring schematics to determine if it applies to your vehicle. If this problem occurs on your vehicle, just bypass the original failed resistor and install a new one in the circuit to restore tachometer operation. It's a very simple matter to splice the new resistor circuit into the existing wiring harness near the ignition coil.

Note: The warning lights (tan holders) used on the Instrument Panel are the "long-life type". They will rarely need replacement as they are seldom illuminated. The illumination lights (white holders) on the Instrument Panel (center of the electronic pack) should be inspected (slight twist to the left and pull out) for deterioration (smoking / graying of the inside of the bulb). Replace any suspect bulb prior to re-assembly. The two odometer (VCM) lights at the bottom of the electronic pack (tan holders) are always illuminated and it is prudent to replace these bulbs (or swap with other low priority warning bulbs if replacements are unavailable) prior to re-assembly.


 

sepbar.jpg (3094 bytes)

This section currently maintained by Pascal Gademer; questions, comments, submissions and suggestions, email pascal@jag-lovers.org

 

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 - 2018
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 (http://commoncrawl.org/faq/), IP Address logged as 54.144.16.135 on 23rd Jun 2018 10:26:44