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Radiator fan modification question

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

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YOUR RESEARCHRadiator fan modification question

Leading reported evidence

Test switches

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No successful repair reported for this finding.

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Suggestion · Original poster

I've hooked up some test-switches today for the fan-mod, and thought I might as well use two switches for either side, if I didn't really need max cooling.

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Radiator fan modification question
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Leading evidence: 'Test switches' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test switches' (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 · 5 captured posts examined · 0 partial discussions

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Use two switches

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

I've hooked up some test-switches today for the fan-mod, and thought I might as well use two switches for either side, if I didn't really need max cooling.

Original post Read captured discussion
Radiator fan modification question
Frequently discussed actions (2)

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

Test switches

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 hooked up some test-switches today for the fan-mod, and thought I might as well use two switches for either side, if I didn't really need max cooling.

Original post Read captured discussion
Radiator fan modification question

Use two switches

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 hooked up some test-switches today for the fan-mod, and thought I might as well use two switches for either side, if I didn't really need max cooling.

Original post Read captured discussion
Radiator fan modification question
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.

5 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: 20261026T133652Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I've hooked up some test-switches today for the fan-mod, and thought I might as well use two switches for either side, if I didn't really need max cooling. However, it seems that either switch (either relay 20 or 22) activates both fans? Are they already linked together somewhere else, and is it thus only necessary to ground-switch one of the two relays?

POST 2Original post

Seems to me you would have to do both relays for low speed/high speed fan operation since they are all separate relays.

POST 3 / ORIGINAL POSTEROriginal post

Yeah but the weird thing is when I do one relay only, both fans come on. So I was wondering if the 85 control pins of both the 20 and 22 relays are already linked together before the relay tray. Needing two relays I understand, you'd want a separate high-current circuit for each fan. But maybe the control wires are already linked.

POST 4Original post

Very possible. Most of the time the relay circuits simply provide a path to ground to initiate/complete the circuit, so they may have a common ground. I suppose you could look at the back of the relay panel to see if the ground wires are connected.

POST 5Original post

I�m pretty good with electrical but for the life of me can�t make sense of some of the �how-to� write ups that I have read. When you finish this - would you mind posting some pics or details on the process? I need to do this on my track car.

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