Discuss MR2 Turbo Radiator Fans not working in the Auto Electrician Forum area at ElectriciansForums.net

N

nytrus90

Hey guys, My Radiator fan (cooling fan No.1) is not getting any supply (12V from the car loom, female connector) when the water temp senor is disconnected and I cant seem to figure out why. I am getting supply (12V from the car loom, female connector)to the air con fan though (cooling fan NO. 2)

Here is the situation:
All fuses (front fuse box and 7.5A gauge) are all ok.

Replaced all relays with known working ones.

I am getting 12v at the relay on cooling fan No.1 when the water temp sensor is disconnected.

there is continuity between the rad fan connector and rad fan relay.

replaced A/C amp with a know working one and still nothing

Anything else I have missed??

Below is a wiring diagram

Am I right in assuming that if the test on the harness that goes into the A/C amp checks out, then it safe to assume I do not have a wiring issue?
 

Attachments

  • Wiring harness.jpg
    97.1 KB · Views: 9
  • fan wiring.jpg
    118.6 KB · Views: 9
Why would you get a supply when the sensor is disconnected.
Are you looking at the right one?
Temp sensors are usually for the gauge and the engine management system.
Temp switch for radiator cooling is usually at the bottom of the radiator or on the bottom hose, monitoring the return temp and switching the fan on if required, ie sitting in traffic.

Boydy
 
Why would you get a supply when the sensor is disconnected.
Are you looking at the right one?
Temp sensors are usually for the gauge and the engine management system.
Temp switch for radiator cooling is usually at the bottom of the radiator or on the bottom hose, monitoring the return temp and switching the fan on if required, ie sitting in traffic.

Boydy

Thanks for the reply matey, I am looking at the right one as when the Water temp sensor is disconnect both fans power on as a fail safe. I am another mr2 with air con and doing the same test produces the correct response in that both fan power on at full RPM (ive attached a snippet from the user manual)

On my working MR2 both fan connectors (female plug from the car loom) receive a 12v supply.
 

Attachments

  • fan test.jpg
    269.5 KB · Views: 19

Reply to MR2 Turbo Radiator Fans not working in the Auto Electrician Forum area at ElectriciansForums.net

Similar Threads

Has anyone taken apart their & self repaired it? 2013 Dodge Grand Caravan SXT - Mileage: 112223 - DTCs - P0480 cooling fan. Also codes in TIPM...
Replies
0
Views
665
Hi everyone I am new in this forum and this is my first thread. Car model: Toyota echo 2004 sedan. I used a multimeter to test the car radio...
Replies
24
Views
3K
I have a troublesome problem on my 924. I have replaced the coolant fan 2 times. The fan works this time, but there's a problem. Let me give you...
Replies
0
Views
1K
The symptoms its been having to start with was the fuel gage only working sometimes and when i play music from my phone when a loud song came on...
Replies
4
Views
986
At our church, one of the things I've done is sort out the heating wiring (as best I can for now). The schematic is as shown below. The theory...
Replies
2
Views
2K

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock