911uk

Cooling fans cheat.

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCooling fans cheat.

Leading reported evidence

Test fans by putting power directly down

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
I tested all the relays, and tested the fans by putting power directly down to the fan motors, where terminal 87 on the relays plugs into.
Original post Read captured discussion
Cooling fans cheat.

Frequently discussed work

Check which one (green?) by starting the engine up

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
So what I did, was cut off the buggered resistor, only one wire is power, you can check which one (green?) by starting the engine up with the a/c on, put that wire to one side of a connector, and put the other two to the other side, and the fan works as it should, only always at high speed.
Original post Read captured discussion
Cooling fans cheat.

Read full discussion summary

Leading evidence: 'Test fans by putting power directly down' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check which one (green?) by starting the engine up' (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 · 2 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Test relays

Performed · outcome unconfirmed

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
I tested all the relays, and tested the fans by putting power directly down to the fan motors, where terminal 87 on the relays plugs into.
Original post Read captured discussion
Cooling fans cheat.

Check which one (green?) by starting the engine up

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
So what I did, was cut off the buggered resistor, only one wire is power, you can check which one (green?) by starting the engine up with the a/c on, put that wire to one side of a connector, and put the other two to the other side, and the fan works as it should, only always at high speed.
Original post Read captured discussion
Cooling fans cheat.

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 which one (green?) by starting the engine up

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
So what I did, was cut off the buggered resistor, only one wire is power, you can check which one (green?) by starting the engine up with the a/c on, put that wire to one side of a connector, and put the other two to the other side, and the fan works as it should, only always at high speed.
Original post Read captured discussion
Cooling fans cheat.

Test fans by putting power directly down

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
I tested all the relays, and tested the fans by putting power directly down to the fan motors, where terminal 87 on the relays plugs into.
Original post Read captured discussion
Cooling fans cheat.

Test relays

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
I tested all the relays, and tested the fans by putting power directly down to the fan motors, where terminal 87 on the relays plugs into.
Original post Read captured discussion
Cooling fans cheat.

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.

2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

911uk: 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: 20261027T192637Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

2001 Carrera 2. Left cooling fan only works on high speed, right one doesn't work a all. I tested all the relays, and tested the fans by putting power directly down to the fan motors, where terminal 87 on the relays plugs into. I bought 2 generic resistors, and took the right side apart, the one that doesn't appear to work at all. This is not as easy as people make out, the wheel arch liner is a sod, and a lot of it is fiddly. Anyway, right fan out, and on the bench, bypass the ballast resistor, and the fan works. So a duff ballast resistor can affect high and low speeds! I've been in the motor trade a long time, and I've found it pays to have a think about what you are doing, rather than just do what's been done before. The ballast resistor is a weak point, so why have one? Why do you need two fan speeds? If you just have high speed, the fan stays on less, and you are removing a weak point from the system. So what I did, was cut off the buggered resistor, only one wire is power, you can check which one (green?) by starting the engine up with the a/c on, put that wire to one side of a connector, and put the other two to the other side, and the fan works as it should, only always at high speed. I was also cleaning the a/c and cooling radiators out so I did the right one by a method I had read on here. When I did the left one I realised that I could clean the rads without removing the wheel arch liner, and also I could modify the wiring, without removing the fan, just cut the wiring as close to the ballast possible, and joining is easy, lots of slack to play with, you don't even have to unplug the fan. Cable tie the wire to somewhere handy, and the jobs a good un. When I was doing this, I realised that my car has a centre radiator, is this standard?

POST 2Original post

Centre radiator isn't standard, only on GT3 and Turbo's i believe? Reason for the two speeds is probably to limit current draw and effect the battery dropping off. What your doing is right however.

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