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Hi I'm wondering if anyone can help I need to do some welding on my lexus rx400h 2008 model and I'm wondering if to power down and isolate the hybrid Battery, is it as simple as removing the isolation fuse plug or are there any other steps that need to be followed 

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16 hours ago, David28 said:

I need to do some welding on my lexus rx400h 2008

Wot on earth could need this doing on such a newish car for heavens sake  ???

Malc

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17 hours ago, David28 said:

Hi I'm wondering if anyone can help I need to do some welding on my lexus rx400h 2008 model and I'm wondering if to power down and isolate the hybrid battery, is it as simple as removing the isolation fuse plug or are there any other steps that need to be followed 

Somewhere around here there's a PDF file documenting how to work safely around the hybrid Battery and its components and I'm almost sure that taking out the Service Plug Grip is all you need to do as this isolates the HV Battery.

HOWEVER - I can't be held responsible if this advice is wrong and you must confirm it 100% yourself before relying on it :thumbsup:

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Disconnect the 12v Battery and remove the Battery ground from the body and the gearbox. It is also advisable to disconnect all ground points of the car.

When welding, keep the ground as close as possible to the point you are welding. Make sure you clean the ground point to a clean bare metal, this will ensure that the current will flow to the welding point directly. Remember the current always flows through the lowest Ohm resistance, hence the need for a zero ground resistance in the welding circuit, otherwise the current will flow through the car's ground wiring, causing catastrophic damage. A good practise is to remove the safety plug too.

Chris.

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