Left Fan not coming on

Left Fan not coming on

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Dischordant

Original Poster:

603 posts

202 months

Wednesday 19th November 2014
quotequote all
Hi guys - left cooling fan at the front isn't coming on - I think it's meant to come on at the lower temperature. The other fan does come on when the coolant temperature hits about 100. I've tried switching the fan connection over and the left fan then comes on but not the right. I assume this means that the sensor is working but that maybe the connection is corroded. I want to test this with a voltmeter/rewire but it is annoying to need to get the engine that hot each time. I read how if I disconnect the sensor it will automatically turn both fans on but unfortunately I cannot find the connection/sensor they use.

Is anyone able to show an image/explain how I find the sensor that I need to disconnect which will cause both fans to turn on?

Many thanks for any help! - would prefer to fix it myself if it's just soldering on a new plug instead of taking it all the way to Oxford for what could be potentially an easy fix!

Darren

Dischordant

Original Poster:

603 posts

202 months

Wednesday 19th November 2014
quotequote all
Apologies for my ignorance but what is the difference between a relay and a fuse?

I checked the fuses that I think are linked to the fans http://www.mytuscan.co.uk/downloads/fuselayout.jpg (the top left and near top right ones) but they were fine as far as I could tell (replaced with new in case).

I don't know where the relays are located (are they 23 and 51 located on the same fuse board?)

In the awesome photo above is throttle body 5 the one nearest the left or the right of the engine in the photo? Again sorry I don't know these things! =)

Thanks guys - you're brill!!


Edited by Dischordant on Wednesday 19th November 15:09

Dischordant

Original Poster:

603 posts

202 months

Wednesday 19th November 2014
quotequote all
Thanks! =)

Switching relays made no difference (only higher temp right fan came on at 100degrees) so relays must be fine.

Will take off the bonnet tomorrow when I have a bit more daylight to spare, disconnect the sensor and check the voltage where the fans plug in - I'm assuming it might be an eroded connector. If so - would I have any luck trying to clean it up with wire wool or better to solder on a new connector?

Cheers!

Darren


Dischordant

Original Poster:

603 posts

202 months

Wednesday 19th November 2014
quotequote all
Thanks Outlaw - where can I pick them up? Tried searching but didn't have much luck =/

Dischordant

Original Poster:

603 posts

202 months

Thursday 20th November 2014
quotequote all
I think it must be the wiring - I tried trimming off the connector and voltage testing the wires and nothing coming through. Think I'm going to have to take it in =/ At least I checked everything I feel able to! Thank you for all your help!