6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHDriver's side Radiator fan only comes on with AC.
Reported or suspected cause
resistor
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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Discussions that report identifying a cause
1
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Reported cause
First rule out that its the fan itself, the relays and fuses, then most likely culprit is the resistor.
Leading evidence: 'resistor' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'resistor' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check fuses' (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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Discussions that performed work without a confirmed outcome
1
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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 suspect a cause
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Suspected cause
If you swiched around the 4 fan relays, located in the drivers footwell behind the fuse box, and that did not change the operation of the fans then your problem is a blown resistor leading to the driver's side fan.
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 suspect a cause
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Suspected cause
Most likely the resistor, also called the ballast.
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 suspect a cause
1
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Suspected cause
There are 4 realys, i belive, they are all the same, switch them around and if the problem is still on the same side, then its not the relays.
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.
Suspected cause
If you swiched around the 4 fan relays, located in the drivers footwell behind the fuse box, and that did not change the operation of the fans then your problem is a blown resistor leading to the driver's side fan.
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.
6 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: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My driver's side radiator fan only activates when the AC is switched on and even then only in high mode. No low mode under any condition. Does anyone know the part number or part that controls this?
Most likely the resistor, also called the ballast. Many posts on how to replace. First rule out that its the fan itself, the relays and fuses, then most likely culprit is the resistor. Its about $100 IIRC.
Series Resistor?
996 616 101 00?
What are the relay numbers and where are they located? - update switched relays 19 & 21 but the driver's side still doesn't work.
I already checked the fuses.
Thanks in advance.
There are 4 realys, i belive, they are all the same, switch them around and if the problem is still on the same side, then its not the relays.
But you have a much more serious problem, the metal on your magnetic plug. I would not even start the car until I went through the old oil filter and dropped the sump plate to check for more metal.
Ehh, I'm driving to work tomorrow as usual. I'll let you guys know if I make it in.
The car has 117k miles. And I actually believe getting the temps down is more important than a little fuzz on a drain plug especially since it's the first magnetic plug it has had in 117k miles. I change my oil every 5k miles since 36k, btw.
I'd bet that both of your fans operate on low but the driver's side fan actually will not run on the high speed setting. Both fans should operate at low speed when the A/C is switched on(assuming the engine temp is below about 102 deg C.?).
The fans only operate at high speed when the engine gets above a certain temp, again I think that temp is about 102 deg. C.
If you swiched around the 4 fan relays, located in the drivers footwell behind the fuse box, and that did not change the operation of the fans then your problem is a blown resistor leading to the driver's side fan. It's located behind the fan in the front wheel well. The part number you referenced here is correct.
Basically, when the fans run at low speed the battery's current is first directed through the resistor to reduce the amount of current being sent to the fan motor. Conversely, when the fan is operating on high, the current bypasses the resistor and the fan motor recieves the full 12 volts from the battery.
This is a source reference. Confirm exact model applicability in the original material.
