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Headlight Washers aren't working

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

Discussion summary

YOUR RESEARCHHeadlight Washers aren't working

Leading reported evidence

Check +12v at the pump and go

Suggestion or failed attempt

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 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

Check for +12V at the pump and go from there.

Headlight Washers aren't working
Read full discussion summary

Leading evidence: 'Check +12v at the pump and go' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check +12v at the pump and go' (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.

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1 matching discussions · 10 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Check 12v

Suggestion or failed attempt

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 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

It may just be that the headlight one is bad, u need to pull the fender liner and check for 12v.

Headlight Washers aren't working

Check 12v will be done as well

Suggestion or failed attempt

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 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

Checking for 12V will be done as well.

Headlight Washers aren't working

Clean ducts

Suggestion or failed attempt

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 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

What it happened to mine, was that they were unused for so long, that the water make a kind of paste inside the pipes and it was needed to clean all the ducts and replace the washers.

Headlight Washers aren't working

Inspect without removing the reservoir, the decision is made

Suggestion or failed attempt

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 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

After removing and inspecting without removing the reservoir, the decision is made to save this project for another day (maybe).

Headlight Washers aren't working
Frequently discussed actions (8)

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

Check +12v at the pump and go

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

Check for +12V at the pump and go from there.

Headlight Washers aren't working

Check 12v

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

It may just be that the headlight one is bad, u need to pull the fender liner and check for 12v.

Headlight Washers aren't working

Check 12v will be done as well

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

Checking for 12V will be done as well.

Headlight Washers aren't working

Clean ducts

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

What it happened to mine, was that they were unused for so long, that the water make a kind of paste inside the pipes and it was needed to clean all the ducts and replace the washers.

Headlight Washers aren't working

Inspect without removing the reservoir, the decision is made

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

After removing and inspecting without removing the reservoir, the decision is made to save this project for another day (maybe).

Headlight Washers aren't working

Replace battery (1500 miles ago) causes the dme

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

A buddy did some searching and read that replacing the battery (1500 miles ago) causes the DME to forget that the washers are there; meaning that a dealer needs to re-flash the system.

Headlight Washers aren't working

Replace imo

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've learned enough to know that either the pump or the relay are bad, and not worth replacing, IMO.

Headlight Washers aren't working

Replace washers

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

What it happened to mine, was that they were unused for so long, that the water make a kind of paste inside the pipes and it was needed to clean all the ducts and replace the washers.

Headlight Washers aren't working
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.

10 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: 20261026T200546Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

The 1999 996 Cab I just bought is so clean that little things like the headlight washers not working are on the to-do list. No, it isn't the biggest deal in the world to me, but it is something that isn't correct, so let's fix it. A buddy did some searching and read that replacing the battery (1500 miles ago) causes the DME to forget that the washers are there; meaning that a dealer needs to re-flash the system. This sounds a little bizarre, but for a first post on this forum, it's all I have so far. Anybody have a better plan than dealer re-flashing?

POST 3Original post

Fyi your headlights have to be on for the headlight washers to activate. Took me a while to figure this out on mine.

POST 4Original post

Quotes source post: 15653909

Right Question. Does the pump on the driver's side fender sounds when you activate them? What it happened to mine, was that they were unused for so long, that the water make a kind of paste inside the pipes and it was needed to clean all the ducts and replace the washers.

POST 5 / ORIGINAL POSTEROriginal post

Good points. The lights were ON, and no sound at all coming from the pump. I know that we didn't check for current after he read that post about re-flashing, so it will be done today. With both lights out (again) I can apply a little bit of air pressure to the hoses and see if a bit of soap placed on the pissers creates a bubble. Checking for 12V will be done as well.

POST 6Original post

If there is no +12V at the pump then put some to it and see if it comes to life. Also, see if there is a fuse for it.

POST 7 / ORIGINAL POSTEROriginal post

The windshield wiper washers work, so the question is whether there are two washer pumps, or are both windshield and headlight washers operated off the same pump? If so, a blockage?

POST 8Original post

Yes there r 2 seperate pumps. It may just be that the headlight one is bad, u need to pull the fender liner and check for 12v. It seems to happen on these cars.

POST 9Original post

Quotes source post: 15654567

There are always 2 pumps in every car out there. Time to get your hands dirty.

POST 10 / ORIGINAL POSTEROriginal post

Quotes source post: 15654943

Not so, maybe two pumps with every car that has headlight washers (maybe), but the vast majority of cars don't have the rally washers...or need them. After removing and inspecting without removing the reservoir, the decision is made to save this project for another day (maybe). I've learned enough to know that either the pump or the relay are bad, and not worth replacing, IMO.

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