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Half the power gone , no crank help ASAP

Old Aug 23, 2025 | 04:12 PM
  #1  
zyggiis's Avatar
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Exclamation Half the power gone , no crank help ASAP

Hello ! Need your help ! My jaguar x300 xj6 1995 vanden plas had rusted metal between trunk and rear bumper , my father in law are fixing it by welding and painting , after the welding the car got crazy (maybe a coincidense) key fob unlocks only 3 doors but not driver doors , it wont start , not even starter makes any sound , the welding was done with battery disconected but still i checked all the fuses , all good , maybe the security module in trunk got damaged ? Key slots in doors are changed by previous owner so i cant even open the driver door manually only from inside , when turned ignition on , i hear all the sounds as usual , fuel pump etc but not even trying to start , also wipers , headlights , turn signals etc doesnt work , checked the slm module in the trunk , inside out its like new , chatgpt says its 99percent security module dead , but cant trust the AI to start changing parts
Appreciate any help
 
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Old Aug 24, 2025 | 01:12 AM
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Welcome to the Forums.

i suggest a repost in the XJ6/XJR (X300) tech section. Members with same model and maybe issues, will hav eanswers.

Electronica and Mig etc welding are not a good match in my opinion.

Rust usually?? means BAD earths will be somewhere nearby, so some looking and cleaning will be a good start.

Good luck.
 
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Old Aug 24, 2025 | 04:06 AM
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Originally Posted by Grant Francis
Welcome to the Forums.

i suggest a repost in the XJ6/XJR (X300) tech section. Members with same model and maybe issues, will hav eanswers.

Electronica and Mig etc welding are not a good match in my opinion.

Rust usually?? means BAD earths will be somewhere nearby, so some looking and cleaning will be a good start.

Good luck.
posted it in x300 thread , thank you
 
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Old Aug 25, 2025 | 12:11 PM
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Dump AI it's regurgitated garbage and it's wrong.
Use this forum with decades of real experience in your car.

Can you get any codes? Can you get any security codes?
This is where to start.
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Old Aug 25, 2025 | 03:44 PM
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for now i cant get codes , will try in weekend, i started to look at the symptoms like 3 times locking and unlocking and like 99% of people having this problem blames the door lock actuator , so my next day mission will be to clean and lube the door locking system , the SLM is fine i guess because the car doesnt start and acts the same as before when i unplug the SLM , also lots of people says it can be body control module , old battery or even key fob battery going , will see
 
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Old Aug 26, 2025 | 11:55 AM
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Not a bad idea as those actuators are a known problem for sure. But without codes it will be hard to pin down exactly.
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