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 Posted: Fri Apr 10, 2015 1:37 am |
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Joined: Apr 09, 2015
Posts: 8
Trade Rating: 0
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Good morning all, I'm having trouble with the cooling system, the low temp relay is not kicking in, the relay itself works as I swap it with the high temp one and it kicks in, if I manually activate the coil it runs the fan, is it controlled via a separate temperature sensor to the high temp relay? If not I don't understand how it works at high temp but not low? Please help
After another look it's the lower relay that doesn't kick in I'm guessing it's the low temp relay because the fan only comes on when the engine gets really hot and the stop sign flashes, any ideas?
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Posted: Fri Apr 10, 2015 4:37 am |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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If the fan only comes on when it's very hot but both relays work them check the wiring to the low speed relay.
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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Posted: Fri Apr 10, 2015 4:49 am |
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Joined: Apr 09, 2015
Posts: 8
Trade Rating: 0
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The original wiring to the relay was corroded so I remade the end of, not sure where the other end goes, don't have a correct wiring diagram
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Posted: Sat Apr 11, 2015 1:09 am |
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Joined: Feb 11, 2010
Posts: 41
Trade Rating: 0
Location: Barcelona (Spain)
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is common fault
exist a resistor between fan and relay box who make slower the fan
simply change it
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Posted: Sat Apr 11, 2015 1:20 am |
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Joined: Apr 09, 2015
Posts: 8
Trade Rating: 0
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The picture you posted is the resister coil, what resistance should I read over the coil? I don't want to swap it if it is ok
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Posted: Sat Apr 11, 2015 4:29 am |
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Joined: Dec 03, 2012
Posts: 96
Trade Rating: 0
Location: Doncaster
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| Squiffy73 wrote: |
| The picture you posted is the resister coil, what resistance should I read over the coil? I don't want to swap it if it is ok |
I purchased a brand new one from Peugeot and it was 0.8/0.9 ohms.
Regards, Richard.
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| Life would be easier with universal jointed arms and fingers sometimes | |
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Posted: Sat Apr 11, 2015 4:46 am |
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Joined: Apr 09, 2015
Posts: 8
Trade Rating: 0
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Thanks Richard, I've just bypassed the coil and still nothing, I think i must have no power to the relay coil because if I physically move the relay the fan runs, the fan coil obviously switches when it warms up so bypassing should bring on the fan but it doesn't. I think I'll have to get dirty and trace the wires thanks anyway
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Posted: Sat Apr 11, 2015 11:44 am |
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Joined: Apr 24, 2013
Posts: 267
Trade Rating: +1
Location: Near Portsmouth
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You cant just bypass it.
Take the covers of the relays and press each one to see if the fans then work.
Mine turned out to be 2 faulty relays and a broken wire going into the relay holders
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Posted: Sat Apr 11, 2015 11:55 am |
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Joined: Apr 09, 2015
Posts: 8
Trade Rating: 0
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I've done that, physically moving the relays makes the fan run, so it's whatever is energizing the relay coil, so the coil is not energizing it's either a faulty component ( that's why I tried to bypass the radiator coil) or a broken wire somewhere in the circuit
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Posted: Sat Apr 11, 2015 12:08 pm |
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Joined: Apr 24, 2013
Posts: 267
Trade Rating: +1
Location: Near Portsmouth
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When you dissconnect the temperature sender wire (Cant remeber what wire but I think the plug might be green) the high speed one should come on (Even with just the ignition on and engine not running).
If it does swap the relays over and try again. If it comes on with the second relay you know they are good.
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Posted: Sat Apr 11, 2015 12:10 pm |
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Joined: Apr 09, 2015
Posts: 8
Trade Rating: 0
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Yeah tried that, the relays both work fine. Thanks for the suggestions though
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Posted: Sat Apr 11, 2015 12:11 pm |
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Joined: Nov 27, 2010
Posts: 11520
Trade Rating: +10
Location: What's it to you? ? ?
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I've got a cooling fan harness to repair soon on a multiplexed 206 with A/C, I might even do a How To with pictures & a brief description of how its meant to work / what the components do.
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| Toyota C-HR GR Sport 2.0 Hybrid with JBL & Alcantara packs. | |
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Posted: Sat Apr 11, 2015 12:13 pm |
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Joined: Apr 09, 2015
Posts: 8
Trade Rating: 0
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That would be very useful
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Posted: Sat Apr 11, 2015 12:16 pm |
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Joined: Nov 27, 2010
Posts: 11520
Trade Rating: +10
Location: What's it to you? ? ?
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Might have to wait a couple of weeks, depends on work / weather to when I get round to doing it 
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| Toyota C-HR GR Sport 2.0 Hybrid with JBL & Alcantara packs. | |
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Posted: Sat Apr 11, 2015 12:19 pm |
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Joined: Apr 09, 2015
Posts: 8
Trade Rating: 0
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No worries, if I ever manage to solve it I'll let you all know
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