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





Rear Defogger Design Changes, Series III

Rear Defogger Design Changes, Series III

Gibson


Evolutionary, the Series II and the Pre-HE XJ-S had heated rear windows that were simply switched on and off. It was a regular occurance for owners to leave the rear screen demisters in the on position just because they forgot it was on, regardless of the indicator being lit. It also accounts for the heated rear window switch to be the one out of the four in the console that had to be replaced first due to the length of time that the load on the switch had to be sustained. I mention this as a precursory note because it is only in the S57 guide (did you notice how I slipped that in Doug, now that I have got one too) that the round relay is mentioned for 'early cars'. But the point is, it is a relay and not a delay unit! As far as the parts catalogue is concerned, the early cars upto 85 were fitted with a delay unit which is at odds with the S57. However, in the later 85 onwards cars there was a variation, which stated that the same delay unit DAC1328 later superseded to DAC10020 was fitted for Canada only and that for everywhere else UKC2421/J was fitted up to VIN 470472 and thereafter the DAC1328 delay unit was fitted. So to summarise, I would have expected Jaguar to have progressed from the original straight switching idea to the fitting of a standard relay in circuit to protect the switch from load. Later on it would be understandable that they fit a delay unit (timed event) to circumvent owners forgetting to switch the demister off. This pattern did indeed happen for the later 85 onwards cars with the Canadians having the benefit of the delay unit throughout.


 

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 - 2023
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 (https://commoncrawl.org/faq/), IP Address logged as 18.205.26.39 on 2nd Dec 2023 14:23:11