Porsche Club GB

Hardtop heated rear screen problems

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHHardtop heated rear screen problems

Leading reported evidence

Clean some goop off these seem pretty shiny now...)

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
[3] The contacts on the left hand hardtop "prong" (cleaned some goop off these seem pretty shiny now...)
Original post Read captured discussion
Hardtop heated rear screen problems

Frequently discussed work

Check of the heating element and the wiring

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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 will need to carry out a continuity check of the heating element and the wiring on the hardtop.
Original post Read captured discussion
Hardtop heated rear screen problems

Read full discussion summary

Leading evidence: 'Clean some goop off these seem pretty shiny now...)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check of the heating element and the wiring' (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.

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1 matching discussions · 4 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Check of the heating element and the wiring

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 will need to carry out a continuity check of the heating element and the wiring on the hardtop.
Original post Read captured discussion
Hardtop heated rear screen problems

Test continuity of the heating element in the hardtop

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 · Original poster
In addition, I will also test for continuity of the heating element in the hardtop with the same multimeter.
Original post Read captured discussion
Hardtop heated rear screen problems

Frequently discussed actions (3)

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

Check of the heating element and the wiring

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 will need to carry out a continuity check of the heating element and the wiring on the hardtop.
Original post Read captured discussion
Hardtop heated rear screen problems

Clean some goop off these seem pretty shiny now...)

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
[3] The contacts on the left hand hardtop "prong" (cleaned some goop off these seem pretty shiny now...)
Original post Read captured discussion
Hardtop heated rear screen problems

Test continuity of the heating element in the hardtop

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 · Original poster
In addition, I will also test for continuity of the heating element in the hardtop with the same multimeter.
Original post Read captured discussion
Hardtop heated rear screen problems

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.

4 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, I've had the hardtop on since late November and have not had reason to activate the heated rear screen until now. Needless to say it won't work. So far I have checked: [1] The two fuses that are mentioned in the fuses guide (enclosed within the fusebox panel) that relate to heated rear screen [2] The switch itself lights up when i press it (I guess there is a relay somewhere, With the Hardtop off the heated screen in the soft top works fine...if I recall) [3] The contacts on the left hand hardtop "prong" (cleaned some goop off these seem pretty shiny now...) [4] The contacts in the socket for the left hand hardtop "prong" Any thoughts?... I guess the wiring could be knackered...is there a diagnostic check that can be done? B

POST 2Original post

You will need to carry out a continuity check of the heating element and the wiring on the hardtop. Check at the contacts first and then if this proves there is no continuity then you will need to get 'inside' to see if the cable is detached from the actual element itself. Perhaps Richard may be able to provide more specific instruction.

POST 3Original post

Sorry - can't find anything in the manual. The system is just hard wired electrics, so no control module and no computer diagnostics. There is a relay on the panel in the driver's side footwell. On the carrier it is in the top row, 4th from the left. Does it click when you press the switch? Also, are the door mirrors heating? They are on the same circuit. Other than that, Peter is correct - get to work with a meter.

POST 4 / ORIGINAL POSTEROriginal post

OK..So I have some time this weekend to get the hardtop off and play around with the multimeter. When the top is off the electrical contacts for the heated screen are exposed. Is there a microswitch or such like that needs to be engaged for the current to flow or can I simply switch on the circuit and expect to read a current accross the contacts with the meter? In addition, I will also test for continuity of the heating element in the hardtop with the same multimeter. B

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