Installing LED indicator bulbs in your LS400?

[Stanwithaplan]

I recently purchased Canbus LED indicator bulbs for my LS400, "bulbs should be error free with 97% of cars", however apparently I was in the 3% that ended up with the fast flashing problem.

The fix was to buy and fit a new relay (goes above the accelerator in footwell). I found one on amazon and here's the link https://www.amazon.co.uk/dp/B07VMLLQ6F?psc=1&ref=ppx_yo2ov_dt_b_product_details £19.07

...now onto to find out how to solve the LED headlights switching off after a minute, I'm thinking I may need to add resistors, or another light fitting with bulb, or does anyone know if there is an LED relay that sort the issue out?

[Herbie]

You could have solved the hyperflash problem with a resistor which would have been cheaper but nothing wrong with replacing the flasher relay either.

Unfortunately, the headlights are a bigger problem.

It's an instant MOT failure (Major) if the bulbs don't match the housing. If the headlamp unit is designed for halogen lamps then it must be a halogen lamp in it. If it's designed for HID Xenons then it must have a HID lamp in it, and if it's designed for LEDs then it must have LEDs in it.

[Stanwithaplan]

Hi Herbs, 

It just seemed a more elegant solution than resistors.

I didn't know about the MOT failure issue. I'll test that in August. I've kept the old HIDs, so can swap them back if needs be. I've done worse, in Dubai I had to swap a metal off-road bumper back to the stock on my FJ once a year. Thanks for the headsup though.

[Herbie]

4 hours ago, Stanwithaplan said:

It just seemed a more elegant solution than resistors.

Absolutely, good call.

Here's the info about the lights, copied from the MOT Inspection Manual: