Porsche Club GB

Faulty Litronic Headlight Level Adjustment

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Original source

6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHFaulty Litronic Headlight Level Adjustment

Leading reported evidence

Check connector and all the connections are sound

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
Checked the connector and all the connections are sound and clean.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Frequently discussed work

Check connector

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
If one isn't moving up and down as you activate it, I would check the connector on the headlamp tray first, before splashing out on a new motor.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Read full discussion summary

Leading evidence: 'Check connector and all the connections are sound' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check connector' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 6 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Check headlight level adjustment by turning the light switch

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
Checked the headlight level adjustment by turning the light switch on and then turning the ignition on and the left hand one is not moving.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Check connector

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
If one isn't moving up and down as you activate it, I would check the connector on the headlamp tray first, before splashing out on a new motor.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Check motor in drive links in the hba module

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
You should be able to check the motor in Drive Links in the HBA module on PIWIS.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check connector

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
If one isn't moving up and down as you activate it, I would check the connector on the headlamp tray first, before splashing out on a new motor.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Check connector and all the connections are sound

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
Checked the connector and all the connections are sound and clean.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Check headlight level adjustment by turning the light switch

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
Checked the headlight level adjustment by turning the light switch on and then turning the ignition on and the left hand one is not moving.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Check motor in drive links in the hba module

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
You should be able to check the motor in Drive Links in the HBA module on PIWIS.
Original post Read captured discussion
Faulty Litronic Headlight Level Adjustment

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Porsche Club GB: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My car is just back from having a new water pump and turbo heat shields fitted. When out last night, I thought the left hand main beam was a bit low. Checked the headlight level adjustment by turning the light switch on and then turning the ignition on and the left hand one is not moving. The connections to the front and rear level sensor appear fine. There are no faults logged on PIWIS. Am I looking at a new drive motor for the headlight level adjustment?

POST 2Original post

You should be able to check the motor in Drive Links in the HBA module on PIWIS. If one isn't moving up and down as you activate it, I would check the connector on the headlamp tray first, before splashing out on a new motor.

POST 3 / ORIGINAL POSTEROriginal post

Checked the connector and all the connections are sound and clean. Cleaned up the earth on the Litronic control module too. Will try with the PIWIS tonight when I can see the light move if it does.

POST 4 / ORIGINAL POSTEROriginal post

Using Drive Links in the HBA module of PIWIS, I got the right headlight to move up and down but not the left so it looks like a new "Electric motor headlight levelling system" 996 631 135 00 ?

POST 5Original post

Yes, that's the one. I had one go on my Turbo. They are about £100 though [ ]

POST 6 / ORIGINAL POSTEROriginal post

Now £110 plus vat. That doesn't include PCGB discount.

This is a source reference. Confirm exact model applicability in the original material.