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Rear Defrosters

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHRear Defrosters

Leading reported evidence

Test each coil in the window

Suggestion or failed attempt

No successful repair reported for this finding.

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Suggestion · Original poster

I'm not good with electrical stuff, so I don't know how to test each coil in the window for continuous voltage, or how I'd fix it if i did find an issue.

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Rear Defrosters
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Leading evidence: 'Test each coil in the window' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test each coil in the window' (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

Frequently discussed actions (1)

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Test each coil in the window

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

I'm not good with electrical stuff, so I don't know how to test each coil in the window for continuous voltage, or how I'd fix it if i did find an issue.

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Rear Defrosters
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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.

  • Rennlist: 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: 20261026T103553Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Anyone know where the wiring harness would be located for the rear defrosters? The top half of my defrosters does not work. I'm not good with electrical stuff, so I don't know how to test each coil in the window for continuous voltage, or how I'd fix it if i did find an issue. I'm wondering if there's any clips or wiring that might be loose, and not the actual coils itself. Any suggestions would be appreciated.

POST 2Original post

There are only 2 connections on my cab 1 at each edge, In all my german cars I've eventually had to buy a bottle of thermal trace repair, it looks like silver/brown fingernail polish, You have to look at each wire and find the places the trace has come off and re-paint the line. Overstuffing the back of a porsche or bug is bad mojo if it rubs on the window. That being said my 996 is fine.. Probably because the window is not a pain in the rear to get at and I don't know for sure if the traces are surface or embedded.

POST 3 / ORIGINAL POSTEROriginal post

PDX, are your plugs visible inside the car? I don�t see any wiring or plugs anywhere. Before I rip apart some interior parts I was hoping to get a starting point.

POST 4Original post

I have a cab with a hard top ,,, So may not apply, The Hard top I cant see a connector either,, But on other cars its just a wire pigtail soldered to a pad on the glass... You should be able to see the traces in the glass and they come together on the ends or the top and bottom of the glass. The defroster often has 2 fuses, one for the main feed to its relay and and one for the wire from the relay to the window. I havnt had to fix the Porsche (Yet) but good luck!

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