Radiator fan does not come on, overheating lamp blinks
T'bird 01. The radiator fan does not turn on while riding or during cool-down. I disconnected it and applied direct power to find it works OK, and there is no shorting between incoming power and earth. When the engine is a little hot, eg 2 hours highway then stop/start traffic on a hot day, the overheating dash lamp comes on and flashes in sync with the blinker dash lamp when I turn the blinkers on !!? Otherwise the overheating dash lamp doesn't come on at all.
I opened up the plastic-wrapped wiring assembly which goes from inside the headlight to the dash lamps. Inside there is a little sealed black box about 2x1x1cm with 4 leads, being (i) plain black single earth in, (ii) brown earth which connects with both a brown earth on headlight plug and other brown earths going to dash lamps, (iii) and yellow and white lead from headlight plug, (iv) a white & brown lead going to overheating indicator lamp on dash. There doesnt appear to be any shorts between blinker power leads and overheating lamp.
So, I'm wondering why the fan isn't coming on, and why the curious flashing lamp phenomenon?
Re: radiator fan does not come on, overheating lamp...
Disconnect the two fan plugs leads from the fan sensor switch in the thermostat housing bridge the two plugs with a wire if the fan starts then you will need to replace the fan sensor switch if not the fan will need replacing ,as for the temp light flashing with the indicator light maybe because they share the same fuse and they could share a common earth as well? Cheers Michael
An expert who has achieved level 3 by getting 1000 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert that has over 10,000 points.
Re: radiator fan does not come on, overheating lamp...
To my knowledge on most designs of bike's electrical system, the overheat indicator lamp is independent of the radiator fan wiring. This light is triggered by a separate thermostat and is basically a sensor/indicator affair. On the otherhand, the radiator fan motor has multiple connections. On one end would be another thermostat to trigger the fan on, the other end would go to a relay/time delay device and is supplied by a fused wire from the IGN B+12. The function of the "relay/time delay device" is to perform the switching action plus to provide supply even when the bike is switch off hence, the fan would still work for a minute or so after engine shut down. Based on this, areas to check would be:
thermostat (normally embedded to the radiator).
Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need. goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Using a test light connect the lid to NEGATIVE and start the engine with A/C on.back probe the positive terminal on the fan.If no power test the fuse. if fuse OK switch the relay with the horn relay and test again. if you have a power to the fan connector switch the test light lid to POSITIVE on you battery and test for good ground to the fan.some times ground wire can corrode and create a lot of problems. If you have good Power and Ground replace the fan.
Here a tip illustrating steps to test and replace the radiator cooling fan and the parts that may cause cooling fan malfunctioning.
replacing the fan, make sure that the fan is really faulty. Read volts at fan
contacts or jump the fan wiring to energize the fan directly.Ensure that fan blades are not blocked.
the fan is OK, then the faulty part is either thermostat or fan relay.Ensure also that
you have tested the 15A fuse in the junction block and the 40A fuse located in
the Power distribution Center (PDC).
Here a diagram showing the location of the fan relay:
Finally, here below the steps required to replace the fan. The procedure is quite simple.
Disconnect the battery negative cable and set it apart.
Disconnect the electrical connector to the radiator fan.
Undo the bolts that hold the top fan housing and fan assembly (this is called Radiator Shroud).
Remove the Radiator Shroud housing.The radiator shroud will come out with the fan sliding toward the top side.
Install the new fan performing the operations in reverse order.
Here a diagram showing radiator shroud and cooling fan assembly:
Just to test the fan disconnect at a connector and apply power directly from the battery. If you have 2 wires at the connector on will be earth and the other will be power.. If the fan is free to run and is not burnt out it should spin. If it does then your problem is in either the relay or temp sender unit
Lamp is burned out or makes a popping sound. When the lamp reaches its end of life, it may burn out and may make a loud popping sound. If this occurs, the projector does not turn back on. To replace the lamp, see on page 38. LAMP light is solid amber If the LAMP light is solid amber, replace the lamp. LAMP light is blinking amber If the LAMP light and the Power light are blinking amber, the lamp driver has failed and the projector will automatically shut down. If the LAMP light is blinking amber and Power light is solid blue, the color wheel has failed and the projector will automatically shut down. Unplug the power cord after 3minutes then turn the display on again. If this problem persists, contact Dell™. TEMP light is solid amber The projector has overheated. The display automatically shuts down. Turn the display on again after the projector cools down. If the problem persists, contact Dell™. TEMP light is blinking amber A projector fan has failed and the projector will automatically shut down. If the problem persists, contact Dell™.
What do you think is overheating? 220 is not overheating.
Is the engine cooling fan coming on?
Any debris (dirt, leaves, bugs, birds, etc.) stuck in the radiator or A/C condensor? (the space between the condensor and radiator is like a belly button, its a space that collects a lot of stuff).
Also it is never a bad idea to change the Thermostat.
Hello: You need to check your thermostat, radiator for proper flow (radiator shop can flow check your radiator) Also if it overheats in traffic your cooling fan(s) may not be coming on. If you have air conditioning that is working start the engine turn the A/C on. Open the hood, the cooling fans should be running. You also may try flushing the radiator. Follow the directions for the flush procedure on the container. If the radiator has crud it may be cheaper to replace the radiator than repair.