Rennlist

Dimming Dash Lights

Add to repair workspace

New repair projectOpen repair workspace

Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHDimming Dash Lights

Leading reported evidence

Replace battery

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
The battery was replaced 6 months ago so I doubt it is the problem.
Original post Read captured discussion
Dimming Dash Lights

Frequently discussed work

Check (v) - should be +/- 13.5-14.2v

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
Start engine & check (v) - should be +/- 13.5-14.2v.
Original post Read captured discussion
Dimming Dash Lights

Read full discussion summary

Leading evidence: 'Replace battery' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check (v) - should be +/- 13.5-14.2v' (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 · 3 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Check (v) - should be +/- 13.5-14.2v

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
Start engine & check (v) - should be +/- 13.5-14.2v.
Original post Read captured discussion
Dimming Dash Lights

Check (v) - should still maintain 13.5-14.0 volts

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
Finally switch on headlights and check (v) - should still maintain 13.5-14.0 volts.
Original post Read captured discussion
Dimming Dash Lights

Check voltage (v) - should be 12,6v

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 you have a digital multimeter (don't rely on the dash volt guage), connect across the battery terminals with the engine off and check the voltage (v) - should be 12,6v for a fully charged battery.
Original post Read captured discussion
Dimming Dash Lights

Replace voltage regulator and the cables

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
Replacing the voltage regulator and the cables to the alternator seems like a painful process, at least from the DIY on RennTech.
Original post Read captured discussion
Dimming Dash Lights

Frequently discussed actions (6)

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

Check (v) - should be +/- 13.5-14.2v

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
Start engine & check (v) - should be +/- 13.5-14.2v.
Original post Read captured discussion
Dimming Dash Lights

Check (v) - should still maintain 13.5-14.0 volts

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
Finally switch on headlights and check (v) - should still maintain 13.5-14.0 volts.
Original post Read captured discussion
Dimming Dash Lights

Check voltage (v) - should be 12,6v

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 you have a digital multimeter (don't rely on the dash volt guage), connect across the battery terminals with the engine off and check the voltage (v) - should be 12,6v for a fully charged battery.
Original post Read captured discussion
Dimming Dash Lights

Replace battery

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
The battery was replaced 6 months ago so I doubt it is the problem.
Original post Read captured discussion
Dimming Dash Lights

Replace voltage regulator and the cables

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
Replacing the voltage regulator and the cables to the alternator seems like a painful process, at least from the DIY on RennTech.
Original post Read captured discussion
Dimming Dash Lights

Run tests as you suggest

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 will confirm and will run the tests as you suggest.
Original post Read captured discussion
Dimming Dash Lights

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.

3 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: 20261026T124918Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My dash lights seem get brighter and darker with the speed of the engine. It seems to happen the most when the Headlights are on. I dont really notice it with the headlights off. The Voltmeter seems to hold steady at 13.5V. Any ideas what could cause this? I was thinking voltage regulator on the alternator or a corroded alternator cable or maybe a bad headlight switch... Thanks

POST 2Original post

This can be caused by either 1) voltage drop due to a poor connection (high resistance) to ground, or 2) a faulty voltage regulator, or 3) a failing battery. If you have a digital multimeter (don't rely on the dash volt guage), connect across the battery terminals with the engine off and check the voltage (v) - should be 12,6v for a fully charged battery. Start engine & check (v) - should be +/- 13.5-14.2v. Finally switch on headlights and check (v) - should still maintain 13.5-14.0 volts. Another symptom of a poor voltage regulator is when your lights "pulse" @ engine idle.

POST 3 / ORIGINAL POSTEROriginal post

Thanks Stephen. The battery was replaced 6 months ago so I doubt it is the problem. I think the lights may be "pulsing" @ idle like you mention. I will confirm and will run the tests as you suggest. Replacing the voltage regulator and the cables to the alternator seems like a painful process, at least from the DIY on RennTech.

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