Request for information regarding a modification on Land Rover Defender TUL(HS) & TUM(HS) vehicles.

The request was successful.

Nicholas Percival

Dear Ministry of Defence,
The MOD have previously released for sale through the appointed disposal contractor Modification Kits for the fitment of a battery negative isolation switch.

The NSN for the kit is 7XD-5999-99-905-0844 and the installation is covered by Modification Instruction 41 in AESP 2320-D-128-811

Can you please confirm if this modification is still current in the AESP or if it has been deleted. If it has been deleted can you please inform me of the reasons why.

I request this information because a suggestion has been made that it was deleted because of safety issues involving vehicle fires caused by the modification. Myself and others have these kits fitted and they are still available for sale through various surplus retailers which naturally raises some significant safety concerns.

Any information would be gratefully received.

Yours faithfully,

Nicholas Percival

DES SEC-PolSec LE-JSC-WPNS (MULTIUSER), Ministry of Defence

2 Attachments

  • Attachment

    20200325 FOI 2020 03101 Percival Modification kits Battery Negative Isolation Switch response O.pdf

    27K Download View as HTML

  • Attachment

    20200325 FOI2020 03101 Percival SNvE 00274 LR All Variants Post MOD 41 Battery Switch Isolator REDACTED FOR RELEASE O.pdf

    267K Download View as HTML

Dear Mr Percival

Please find a response o your recent FOI request.


Defence and Equipment Secretariat
MOD Abbey Wood, #2043 | Maple 0a | Bristol | BS34 8JH
Email: [email address]

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