Cooling fans not working
Moderator: RichardW
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- My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
2008 C5 X7 1.6HDI VTR+ Saloon - x 231
Thanks everyone, I've now established both fans are working (slow speed) by jumpering the Left Fan Relay socket Pins 3 & 5. I've also checked every fuse and they're all present and correct.
To recap, all 3 relays, all fuses and both fans are in working condition. The temperature gauge sender reacts normally via the instrument gauge.
+12v Read at;-
[LEGEND; L= Left Fan Relay, R= Right Fan Relay, C= Change Over Relay]
Ignition OFF
R Pin3
L Pin3
Ignition ON
C Pin1
R Pin1 & 3
L Pin3
Ignition ON and Temp Sender disconnected
C Pin1
R Pin1 & 3
L Pin 3
Damn, I forgot test the earths
To recap, all 3 relays, all fuses and both fans are in working condition. The temperature gauge sender reacts normally via the instrument gauge.
+12v Read at;-
[LEGEND; L= Left Fan Relay, R= Right Fan Relay, C= Change Over Relay]
Ignition OFF
R Pin3
L Pin3
Ignition ON
C Pin1
R Pin1 & 3
L Pin3
Ignition ON and Temp Sender disconnected
C Pin1
R Pin1 & 3
L Pin 3
Damn, I forgot test the earths
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- x 2
We're getting closer to the problem. I'm sure we'll soon have it sorted.
You're still missing a live (+ve) on pin 1 of your left hand relay. This should be live even if the earths are poor.
Can you test if you have volts (+12 ) on fuse F14.
From the diagram, fuse F14 is supplied by fuse D in the BMF1 unit. Fuse D may be the problem.
You're still missing a live (+ve) on pin 1 of your left hand relay. This should be live even if the earths are poor.
Can you test if you have volts (+12 ) on fuse F14.
From the diagram, fuse F14 is supplied by fuse D in the BMF1 unit. Fuse D may be the problem.
Cheers, Kev
02 plate C5 2.2 Hdi Exclusive SE (now 170k miles 03/21).
Used to have:- Xantia 1.9 TurboD SX. 1996 Blue & 1998 Silver Activa. + 1992 BX TZD Turbo.
02 plate C5 2.2 Hdi Exclusive SE (now 170k miles 03/21).
Used to have:- Xantia 1.9 TurboD SX. 1996 Blue & 1998 Silver Activa. + 1992 BX TZD Turbo.
Thanks addo. After spending several weeks sorting the electrics for heater fan, dashboard lights, poor headlight connection, radio fuse, gear selector solenoid, interior lights and others, I can think of several rude acronyms !!!
98 Xantia Mk2 2.0 16v Auto Exclusive 160k + Now gone to Citroen Heaven
2004 C5 Mk 1 2.0 8V VTR Estate - current. Now with leather.
2004 C5 Mk 1 2.0 8V VTR Estate - current. Now with leather.
According to my handbook, looking at the engine fusebox from the front of the car, fuses A and D are high voltage fuses to left of box and are vertical in two rows. Top row right is fuse A (60A) and top row left is fuse D (40A). Hope this helps.
98 Xantia Mk2 2.0 16v Auto Exclusive 160k + Now gone to Citroen Heaven
2004 C5 Mk 1 2.0 8V VTR Estate - current. Now with leather.
2004 C5 Mk 1 2.0 8V VTR Estate - current. Now with leather.
Hi Mike,
Just as per hirsty’s post … pictures of fuses A & D, 60A and 40A.
Fuse A of 60 Amps is OK because it feeds most of the ignition switch functions, including the high fan speed switching, which works on one side.
Between fuse D and F14 under the dash is what looks like a zigzag component that the BoL calls a shunt.
The shunt is a bigger fuse, upstream of smaller fuses, without specifying the number or value, but is 2V NR in box E of the location diagram.
You must have 12V on pin 1 of 1502 even with the key out; from the battery through fuse D first, then through the shunt fuse under the dash, and lastly through fuse F14, which is 13V OR.
Just as per hirsty’s post … pictures of fuses A & D, 60A and 40A.
Fuse A of 60 Amps is OK because it feeds most of the ignition switch functions, including the high fan speed switching, which works on one side.
Between fuse D and F14 under the dash is what looks like a zigzag component that the BoL calls a shunt.
The shunt is a bigger fuse, upstream of smaller fuses, without specifying the number or value, but is 2V NR in box E of the location diagram.
You must have 12V on pin 1 of 1502 even with the key out; from the battery through fuse D first, then through the shunt fuse under the dash, and lastly through fuse F14, which is 13V OR.
2002 C5 2.0i AL4 230,000 km 76372389
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- Posts: 4809
- Joined: 11 Jun 2007, 16:17
- Location: Christchurch, Dorset. UK
- My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
2008 C5 X7 1.6HDI VTR+ Saloon - x 231
Of course! The heavy-duty engine bay fuses are alphabetically labelled, doh!
It's raining here so didn't re-test them again but instead located a "shunt" fuse under the dash and that's fine. Then tested for 12V at F14 and that's fine so the fault seems to lie between F14 and the fan relay? Are we sure F14 is the correct fuse as it's only described as serving ""Injection ECU - Refrigeration Cut-Off Relay"? before I look elsewhere?
It's raining here so didn't re-test them again but instead located a "shunt" fuse under the dash and that's fine. Then tested for 12V at F14 and that's fine so the fault seems to lie between F14 and the fan relay? Are we sure F14 is the correct fuse as it's only described as serving ""Injection ECU - Refrigeration Cut-Off Relay"? before I look elsewhere?
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Mike, what's the RP number of your car? With that I can then post up the right applicable diagrams.MikeT wrote: considering we're not 100% sure the given wiring diagrams are that of my car?
I'll bet a bob that the duff wire is in the loom that runs under the rad and across the front of the car...
Jim
Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...
Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...