If you have a new sensor on hand and want to check it, you can do this easy test. Connect the black lead of the meter to the body of the cold sensor and the red to the terminal. You should have a reading of approximately 2000 ohms. Check the warm sensor in your engine.
Full Answer
How to test the fan switch on a 1987 Golf Mk1?
1987 Golf MK1 Cabriolet 1.8, 8v without air-conditioning. Ok, Quick test of the switch using a paper clip held in pliers. REmove the switch from the connector. Key on and in the Run position. If you jumper from the bk/r to any of the other 3 wires your fan should spin. if it doesn't the you are lookinf at the Fuse, motor or the ground being bad.
Why does a VW fan need a ground wire?
VW originally used a single speed fan, that was simply controlled by a switch in the radiator. They applied 12V+ from the battery to one side of the switch, and the other went up to the fan. Since current needs a path from ground to a source. VW added a ground wire to the fan, why because the fan is mounted to a shroud,
What temperature does the Peugeot fan switch Switch on at?
I fitted the Peugeot fan switch to my Mk1 about a month ago. The Ecklin manual states that this fan switch should switch on at 82 or 85 degrees celcius (can't remember which is correct). Only thing is that it only has one stage ( 2 pins), dont know if it will work on a car that requires two stages.
How do I test if my fan is working properly?
Jumper 12V+ to the RED/BLK wire one at a time to +12V if the fan runs on both hi/low speed your fan is good. Reconnect the connector, and now measure for a good ground via resistance to the Brown Plug or the Case of the fan.
How do you test a heater fan switch?
2:146:18How to test and replace your blower motor resistor - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo right now what I have I have my multimeter hooked up to the resistor right here so we have theMoreSo right now what I have I have my multimeter hooked up to the resistor right here so we have the positively to the actual wire. That's going straight to the resistor.
How do you test a blower motor resistor on a VW?
0:157:122009 VW Jetta Heater Blower Testing and Replacement With ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo i'm going to change the blower resistor because it's failed blower resistors up under the dash.MoreSo i'm going to change the blower resistor because it's failed blower resistors up under the dash. Here. You can see it right there that white component. But before we change the blower resistor.
How many ohms should a blower motor resistor have?
According to the service manual, it must be around 4-5 ohms. In our case the ohmmeter shows open circuit, which means the resistor has failed. Sometimes, a blower motor resistor might fail due to problems with the blower motor itself.
How do you test a blower motor with a multimeter?
0:051:04Blower motor test - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo you throw it on there. Are enough like five seconds make sure that it can handle it because thisMoreSo you throw it on there. Are enough like five seconds make sure that it can handle it because this is simulating pole speed. And that's how you test for motor. I am.
How do you tell if the blower motor is bad or the resistor?
A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed.
Is there a way to test a blower motor resistor?
Place one lead of the Ohmmeter on terminal 1 of the resistor. Place the other lead on terminal 2 and check against specifications. If this circuit is open, showing infinity on the Ohmmeter, the blower resistor must be replaced. Move the lead from terminal 2 to terminal 3 and check this reading against specifications.
Will a blower motor work without the resistor?
Without any power, the motor won't run. As a result, the blower fan stays still and silent, and no air blows out of the vents. There are instances where a bad resistor will prevent the current from reaching the blower motor altogether.
How do I test a resistor with a multimeter?
0:262:21How do i Check and Measure Resistor Value With Digital Multimeter?YouTubeStart of suggested clipEnd of suggested clipAnd take a resistor and touch the multimeter probes to the resistor. You can touch any prob any sideMoreAnd take a resistor and touch the multimeter probes to the resistor. You can touch any prob any side of the resistor. If multimeter doesn't show any resistance.
How do you test a blower motor control module?
4:328:52DIagnose and Replace GM blower Control Module - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf we look at the meter. We have battery voltage on this connector. So that means we have powerMoreIf we look at the meter. We have battery voltage on this connector. So that means we have power going to the blower motor control module if you did not have power going to this module.
What causes a heater fan to stop working?
If little air is coming through the vents (hot or cold), then it could be because the blower motor for the fan or a switch or resistor that controls fan speed isn't working. Another cause might be that the electronically controlled “blend doors” that direct air flow are stuck or broken.
How do I know if my blower motor has power?
0:145:18Step by Step Procedure for Troubleshooting a Blower Motor ...YouTubeStart of suggested clipEnd of suggested clipAnd then you put one probe on there and one to the l2. Common neutral bar right here and you shouldMoreAnd then you put one probe on there and one to the l2. Common neutral bar right here and you should read 120 volts. If you read 120 volts. And your blower motor is not turning on then.
How do you test a blower motor relay?
Connect a test light or multimeter to the ground (black lead). Turn the ignition key to the on position (engine off), and remove the relay. Using the probe, test all terminal sockets in the relay connector. Two of the four should have power.
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Had this problem since i've owned the car, noticed the plastic cowling was melted and from a few futher investigations realised the blower was not working on setting 1 and was heating the resistor up so much that it was melting the cover and have basically not used this setting since, 2,3 are fine.
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Still really confused, checked all wiring all ok, cleaned up contacts on blower motor although was unable to get the motor out. (if anyone knows how to get it out without dropping the lot from inside would be appreciated). Haynes manual useless as only tells you how to remove the whole lot from inside.
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Yeah tried wd 40 previously incase anything was starting to seize up, run it for a bit on no3, then silicone lube and run again on no 3 but didn't change and have repeated this time after resistor change with no improvement.
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The blowers didn't work on no.3 on my tintop, that was the switch at fault though.
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just wondering if you have tried anything else or figured out what the problem was? My fan does either not start at all or will start for a little bit and then turn off again. Changed the switch but to no effect. Not sure what to do next.
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Hi, just wondering if you have tried anything else or figured out what the problem was? My fan does either not start at all or will start for a little bit and then turn off again. Changed the switch but to no effect. Not sure what to do next.
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what happens is that if I turn on the fan (it doesn't matter which setting) it comes on for 2 mins or so and then stops. sometimes it does not come on at all (again regardless of the setting).
Changing Golf 1 Thermostat and Fan Switch
Gents Ok so where do I start? The fan on the bakkie isnt coming on, tested the fan and it works. So I bought a new thermo and a fan switch. Where the hell does the thermo sit, and how do i bleed it after I changed everything.
Re: Changing Golf 1 Thermostat and Fan Switch
The minute I get home I'll do it. I'm gonna change the switch and the thermostat to be on the safe side.
Re: Changing Golf 1 Thermostat and Fan Switch
the thermostat fits in the water pump housing, follow the bottom pipe of the radiator, it goes into a plastic fitting on the water pump, with 2 no.10 bolts holding the fitting to the water pump. Open the 2 bolts and the thermostat will pop out.
Re: Changing Golf 1 Thermostat and Fan Switch
Hey Torker i need to get ahold of you somehow i have a few questions i need to ask.
What is the white wire on a fan motor?
The white wire is called the run wire, the brown wire is called the start wire and the black wire is called the common wire. If your fan motor differs in any way to the configuration described here make sure to get the manual and check it for details. If you are still unable to locate or identify a part necessary for testing described here, ...
What color wires are used for fan motors?
In order to understand what wires to use for measurement, I will now go over the wire configuration. Fan motors usually have two wires; brown and white – brown wires that are plugged into the capacitor. Other two wires are black and white and they are to be plugged into the capacitor.
Why does my fan motor break down?
Always visually check the capacitor before you start testing because ruptured capacitors and capacitors with dents or any other types of deformities are obviously broken and you need to replace them as soon as possible.
How to test a second set of wires?
Test the second set of wires: The brown wire is the start wire and the black wire is the common wire. Take your multimeter and place the negative (black) multimeter probe on the brown wire. You should put the red probe on the white wire. Any value between and around thirty-two to forty ohms should be considered as standard value.
How many ohms should a black multimeter test?
You will now place the red probe on the common wire. Values measured in this phase of testing should be around fifteen ohms.
How to test 4 wires?
Test the fourth set of wires: Keep the red test lead on the black wire and take the black probe off of the white wire. Place the black probe on the white wire. It is preferable to do this test without the moving blade. The multimeter should show values around twenty ohms. Besides the obvious safety reasons related to electricity and possibility ...
How many ohms should a multimeter have?
The multimeter should show values around twenty ohms. Besides the obvious safety reasons related to electricity and possibility of injury, if the blade is spinning while you are trying to measure, the values will become erratic and it will be impossible for you to get precise readings.
What does 12V+ mean on a single speed fan?
If the engine is up to temp, and your fan doesen't engage, Quickly measure for 12V+ to the motor to frame. If the 12V+ is there, then you are missing the ground to the connector.
Why does VW have a ground wire?
VW added a ground wire to the fan, why because the fan is mounted to a shroud, that is bolted to plastic radiator tanks. These plastic tanks are an insulator, and will not conduct ground. The above is a/c equipped cars, the radiator fan switch also acted as the "After Run" fan switch Simple is more better.
What happens when a radiator fan is off?
or from the grille. When the radiator fan is off, they are allowed to free open, so that the radiator has air flow across the width of the core.
What happens if a radiator relay goes bad?
this is a non-waterproofed relay that is subject to water spray, and battery outgassing. If it goes bad, your radiator fan usually won't come on for normal operation, but will if the a/c is turned on. In the a/c circuit, you have F1 sending power to the low speed cooling relay (fender) and to the radiator switch.
How does a radiator fan work?
if the control selector is in the black area , on non-defrost, then the radiator fan operates as if the a/c isn't there. If the a/c is on, then it turns on the radiator fan.
What relay does F1 use?
In the a/c circuit, you have F1 sending power to the low speed cooling relay ( fender) and to the radiator switch. In the a/c equipped car, f1 also sends 12V+ Through the a/c relay, then the radiator switch and to the radiator. fan relay (FENDER). as well as straight to the FAN.
Is a radiator fan stupid?
The Radiator fan was and is stupid. It has to be told when to turn on instead of being run by a direct fan. So they added a Radiator fan switch to tell the radiator fan when to turn on. Now your radiator fan is told to run, it doesn't care if your radiator cards are there or not. It is told to run.