Question about 1991 Peugeot 405
Hi I have a 90/91 405 gld saloon. The twin cooling fans have stoppped working. There are THREE relays for the fans. What does the Third relay do? and any suggestions as to how to get them working again?. I have powered the motors and they are fine. there seems to be no power to the plug on the switch that is built into the Radiator. Thanks John I have the same problem with a '93 405 except I cannot even locate the relevant relays and the Haynes manual is deliberately vague on all locations and wiring specs. The wiring supply from the radiator thermostat switch has 3 contacts and shorting any or all combinations produces nothing.
Hmm, perhaps it is time for a noisy solution.
Get a 30 amp relay and wire the fans via directly to the battery via that relay. Of course, disconnecting them from where that are wired into the vehicle now.
For the fan control to the relay, wire something that is (+) when the ignition is in the 'run' position.
This, of course, is the quick n dirty fix. While this will work, you have an always on, noisy solution, and it will take quite some time for your vehicle to warm up in the winter time.
Just an idea should you not be able to correct the factory wiring, of which I have no idea.
Best of luck,
Posted on Mar 04, 2009
Tips for a great answer:
Aug 02, 2016 | Cars & Trucks
May 15, 2016 | Ford Cars & Trucks
A/C refrigerant pressure exceeds 1 310 kPa (190 psi).
After the vehicle is shut off if the engine coolant temperature at key-off is greater than 140?°C (284?°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.
The BCM and PCM/ECM command High Speed Fans on under the following conditions:
Engine coolant temperature reaches 110?°C (230?°F).
A/C refrigerant pressure exceeds 1 655 kPa (240 psi).
When certain DTCs set.
The three relays are located in the under hood fuse / relay box ! You need to have it checked for DTC'S -diagnostic trouble codes ! An you need a GM Tech 2 scan tool !
This diagnostic procedure supports the following DTCs:
DTC P0480 Cooling Fan 1 Relay Control Circuit
DTC P0481 Cooling Fan 2 and 3 or S/P Relay Control Circuit
DTC P0691 Cooling Fan 1 Relay Control Circuit Low Voltage
DTC P0692 Cooling Fan 1 Relay Control Circuit High Voltage
DTC P0693 Cooling Fan 2 and 3 or S/P Relay Control Circuit Low Voltage
DTC P0694 Cooling Fan 2 and 3 or S/P Relay Control Circuit High Voltage
Aug 08, 2015 | Cars & Trucks
May 01, 2015 | AC Cars & Trucks
Apr 06, 2015 | 1997 Acura RL
Dec 14, 2014 | Chevrolet Cars & Trucks
Apr 26, 2010 | 1998 Cadillac DeVille
Sep 23, 2009 | 1991 Peugeot 405
Nov 23, 2008 | 1985 Volkswagen Golf
224 people viewed this question
Usually answered in minutes!