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Discussion summary
YOUR RESEARCHBallast resistor replacement
Leading reported evidence
Install some mesh and drl's
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Performed · outcome unconfirmed · Original poster
One shows the new resistor in place and the other shows the front now I've fitted some mesh and DRL's.
Leading evidence: 'Install some mesh and drl's' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect battery' (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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Suggestion · Original poster
I would disconnect the battery for safety at this point.
Reconnect battery and make sure all fuses are good
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Suggestion · Original poster
Reconnect the battery and make sure all fuses are good.
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Suggestion · Original poster
I have just finished replacing my ballast resistor on the passenger side and I've done it a lot cheaper than using the genuine Porsche Ballast resistor.
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.
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Suggestion
Great write up and just at the right time as I'm just looking to replace my drivers one now so will give this ago.
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Suggestion · Original poster
I have just finished replacing my ballast resistor on the passenger side and I've done it a lot cheaper than using the genuine Porsche Ballast resistor.
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Suggestion · Original poster
I have just finished replacing my ballast resistor on the passenger side and I've done it a lot cheaper than using the genuine Porsche Ballast resistor.
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5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Generation: 20261026T142254Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
For anyone who has a 996 with non-functioning low speed fans on either of the 2 front mounted radiators.
I have just finished replacing my ballast resistor on the passenger side and I've done it a lot cheaper than using the genuine Porsche Ballast resistor. I'll do a step by step guide but if anyone wants any help, message me.
I'll describe the passenger side but obviously if yours is drivers side then alter as required.
Before you start, go to RS or similar and get a 0.5R 100W (RS code 188-071) resistor. This will cost you about £5 inc VAT.
1. Remove the wheel and support on a suitable axle stand.
2. Remove the wheel arch liner which will give you access to the ballast resistor wiring.
3. You should see the resistor on its clamp with the wiring coming from it.
4. I would disconnect the battery for safety at this point.
5. Cut the wiring as close to the old ballast resistor as possible.
6. Remove the old resistor and bin it.
7. Identify the three wires (green, white and green/white).
Green = Low speed fan supply
White = High speed fan supply
Green/White = Output to fan motor
8. I suggest you get hold of a good soldering iron, you will need something quite powerful or use good quality crimp connectors and cover all joints with heatshrink, the stuff with adhesive in is the best choice.
9. Solder the White and Green/White wires to one side of the resistor and then cover with heatshrink.
10. Solder the Green wire to the OTHER end of the resistor and cover the joint with heatshrink.
11. Drill a couple of holes so you mount the new resistor where the old one used to be. Make sure its in the airflow of the fan.
To test the new resistor.
Reconnect the battery and make sure all fuses are good.
First of all you need to know where the relays are. Look under the dash above the fusebox and you'll see a row of grey relays (each is marked with a large 53).
Working front to back, they are :
1. Not important for this
2. Passenger side low speed
3. Passenger side high speed
4. Drivers side low speed
5. Drivers side high speed
OK, choose which relay you need to pull, I would suggest high speed first of all.
Once you've pulled the relay, make a short piece of wire ( 100mm) and crimp a blade type connector one each end. Use this to "jump" the relay.
Connect from the top connection (vertical slot) to the bottom horizontal slot. The fan should run at full speed (you'll hear it).
OK, now remove the link and replace the relay.
Do the same again for the low speed and you should hear the fan run at a lower speed.
Remove the link wire and replace all relays.
Replace the wheel liner and roadwheel.
Start the car and put the a/c on and set it to the lowest temperature, give it a few seconds and you should hear both front fans running at low speed.
I'll post a couple of pictures to go with this. One shows the new resistor in place and the other shows the front now I've fitted some mesh and DRL's.
If anyone has any questions or needs a hand, message me.
Good idea. Both mine have gone and I need to replace them. If I can do it for £10 instead of £150 then that would be great. Did you place the replacement resistor in the same place as the old one?
I am going to remove the front bumper on mine to replacement them as the radiators need a clean out and I need to install some mesh. I like your DRL's. Can you provide some details of where you got them and where you took the supply from to power them?
Thanks.
Hi all...keeping info together on same (old post)
Is this resistor the same in all 996 models? I read that it may be different in turbo or c4s...than c2? Specifically asking for 2004 turbo.
Thanks
K
This is a source reference. Confirm exact model applicability in the original material.
