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Car Forum / Peugeot Cars / May 2005406 cooling fan - which sensor?
Anyone know what the different colour coded sensors (3 of them) are on the 'stat housing? My fan's not running so need to short the fan switch to test it but not sure which of the 3 it is. John Not sure on the 406, but thermostatic switches for the coolin fan are usually in the radiator housing itself (they are on pug 106) >Not sure on the 406, but thermostatic switches for the coolin fan are >usually in the radiator housing itself (they are on pug 106) Not on the 406. Three on the thermo housing. Blue does the gauge, green does the ECU, brown does the fans As a quick check, with the engine running, disconnect the brown one. The fan(s) should come on fast speed. If ok then the fast speed does work. But the slow speed could still not be working. You need to check the relays, resistors and connectors, and generally the wiring to the fan(s). Cheers Nigel. I had assumed it was the blue one (only having a single spade in it). Fan fires up on full speed when you pull the brown one, so suspect the switch is duff. John PS. Must get around to buying a workshop manual! Far too many wires and switches these days! PPS. For future reference, where is the fan relay on these, it doesn't seem to be in the engine bay >>Not sure on the 406, but thermostatic switches for the coolin fan are >>usually in the radiator housing itself (they are on pug 106) [quoted text clipped - 5 lines] > could still not be working. You need to check the relays, resistors > and connectors, and generally the wiring to the fan(s). >Cheers Nigel. I had assumed it was the blue one (only having a single spade >in it). Fan fires up on full speed when you pull the brown one, so suspect [quoted text clipped - 6 lines] >PPS. For future reference, where is the fan relay on these, it doesn't seem >to be in the engine bay upperside between the fans, triangularish box the fault can be in the wire loom that sits behind it >>>Not sure on the 406, but thermostatic switches for the coolin fan are >>>usually in the radiator housing itself (they are on pug 106) [quoted text clipped - 5 lines] >> could still not be working. You need to check the relays, resistors >> and connectors, and generally the wiring to the fan(s). Ah... pretty good at hiding things aren't they? >>Cheers Nigel. I had assumed it was the blue one (only having a single >>spade [quoted text clipped - 22 lines] >>> could still not be working. You need to check the relays, resistors >>> and connectors, and generally the wiring to the fan(s). >Ah... pretty good at hiding things aren't they? i searched for two hours for the damn thing then i called a family pug dealer to point me out ( to damn proud to do that earlyer) your fault might well be in the ground cable from one of the relay's mine was rotten of after two years of salt in wintertime.... >>>Cheers Nigel. I had assumed it was the blue one (only having a single >>>spade [quoted text clipped - 22 lines] >>>> could still not be working. You need to check the relays, resistors >>>> and connectors, and generally the wiring to the fan(s). Gents I have a 406 1.9 TD (1998) with air con. Only one of the fans works at high speed when the brown thermostat connector is disconnected. I have looked at the relays and they are good . I have now proved the fault into the wiring from the relays, a faulty fan or fan earth. Does any one know how to get at the fans without taking the rad, intercooler and air con rad out. I understand the fans auto connect electrically when the fans are secured. This could well be the fault. Also where is the earth point mentioned as this would be worth checking does any one know where it is. Mike > >Ah... pretty good at hiding things aren't they? > [quoted text clipped - 30 lines] > >>>> could still not be working. You need to check the relays, resistors > >>>> and connectors, and generally the wiring to the fan(s). |
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