Seeking help with a halogen to LED headlight retrofit issue.

933 Views 3 Replies 2 Participants Last post by MF4, May 27, 2022

waylon

Discussion Starter · May 26, 2022

I've managed to blunder my way through getting the LED headlights installed and coded, but am unsure about why the headlights turn off after a second or two of being on. ISTA+ still shows that the two control modules need encoding (despite encoding them (I think) via E-Sys). I believe the left turn signal isn't coming on because of a bad connection, but other than that am unsure why the right headlight goes off before the left headlight or how to get them to stay on for actual driving. I've attached a 6 second gif showing what it's doing. Any advice would be appreciated. Thank you!

Car Vehicle registration plate Vehicle Automotive lighting Grille

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MF4

· #2 · May 27, 2022

First of all, have you checked if your BDC ecu supports led headlights?

Then, have you entered the 5A2 code in the FA and coded with e-sys the BDC and FLE ecu?

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waylon

Discussion Starter · #3 · May 27, 2022

MF4 said:
First of all, have you checked if your BDC ecu supports led headlights?

Then, have you entered the 5A2 code in the FA and coded with e-sys the BDC and FLE ecu?

Yes, LED is supported.
Yes, I've coded 5A2 in the FA and used e-sys to identify and code the two new caf files for the two new modules. ISTA+ is showing a fan-line disconnection fault, and a voltage outside of tolerance range fault.

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MF4

· #4 · May 27, 2022

Have you changed the wiring according with the new led scheme?
It seems a wiring problem, too high voltage in some wires

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