c5 fuse box b

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scas
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c5 fuse box b

Post by scas »

hi, my c5 2006 has a suddenly non working hydraulic pump. i think the fuse in in fuse box b- where exactly is that. obviously if it has blown, theres a reason, but at the minute the cars almost on the ground. help :?

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Stickyfinger
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Re: c5 fuse box b

Post by Stickyfinger »

The MAXI fuses are under the fuse box on a sceond "layer".

Mostly the pumps blow due to a build up of carbon crud inside and short. The pumps can be switched and the original ECU switched over. (have it cleaned and re-brushed before fitting it ?)

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Re: c5 fuse box b

Post by scas »

you wouldnt have a ;ink to a picture of where they are.most references point at internally

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Stickyfinger
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Re: c5 fuse box b

Post by Stickyfinger »

Similar to this in the C6
1487167631_1919_FT0_6_.jpg
Two clips under the C6 top layer...not sure on the C5


Pump removal
Last edited by myglaren on 27 Feb 2020, 20:47, edited 1 time in total.
Reason: Video link

scas
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Re: c5 fuse box b

Post by scas »

thanks. ill have a look tomorrow

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Stickyfinger
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Re: c5 fuse box b

Post by Stickyfinger »

viewtopic.php?t=63989&hilit=C5+maxi+fuse

Search the forum Maxi fuse - C5 fusebox - etc

scas
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Re: c5 fuse box b

Post by scas »

i checked the big fuse with a multimeter and its fine. the haynes doesnt have a wiring diagram for the pump, is the main power wire in the 10? pin connector on the front of it?

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Stickyfinger
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Re: c5 fuse box b

Post by Stickyfinger »

viewtopic.php?t=56094

I know zip all about electrics, others will need to help you on that....

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Re: c5 fuse box b

Post by Gibbo2286 »

If you go to the front right where the pump is located you should see the wiring loom feeding it. Open the loom (Cut back the wrapping with a craft knife) there are three wires, two thick ones and a thin one, the thick ones are the live and earth, you can check if the voltage is getting there by pushing a needle into each and measuring the voltage with a meter.

If you have voltage there and the pump doesn't run then most likely your pump's died, you can further check by applying 12 volts to the thin wire which should cause the motor to run if it's good.

scas
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Re: c5 fuse box b

Post by scas »

Gibbo2286 wrote:
29 Feb 2020, 12:45
If you go to the front right where the pump is located you should see the wiring loom feeding it. Open the loom (Cut back the wrapping with a craft knife) there are three wires, two thick ones and a thin one, the thick ones are the live and earth, you can check if the voltage is getting there by pushing a needle into each and measuring the voltage with a meter.

If you have voltage there and the pump doesn't run then most likely your pump's died, you can further check by applying 12 volts to the thin wire which should cause the motor to run if it's good.
thanks i shall give that a go :)

scas
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Re: c5 fuse box b

Post by scas »

right, spliced a wire from the battery to the thin wire and the pump whirred into life, it didnt actually raise the suspension though. a brake master cylinder of a mk6 transit has the same thread as the fluid reservoir, drilled a small hole in it and pressurised the reservoir with air. didnt do anything :? took splice off and the pump still works as it should- opening the door etc, for about 20-40 seconds, but doesnt raise the car. also no smell of burning.
im guessing that means the pump is buggered

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Re: c5 fuse box b

Post by Gibbo2286 »

scas wrote:
29 Feb 2020, 14:10
right, spliced a wire from the battery to the thin wire and the pump whirred into life, it didnt actually raise the suspension though. a brake master cylinder of a mk6 transit has the same thread as the fluid reservoir, drilled a small hole in it and pressurised the reservoir with air. didnt do anything :? took splice off and the pump still works as it should- opening the door etc, for about 20-40 seconds, but doesnt raise the car. also no smell of burning.
im guessing that means the pump is buggered
I think the pump itself is not 'buggered' if it runs, It might be the bsi on the pump but usually if the pump runs it should only need bleeding, are you sure there is enough fluid in the system?

scas
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Re: c5 fuse box b

Post by scas »

yes loads of fluid. i loosened the small metal hydraulic line on the front of the pump and fluid came out-no air. is there a way of bleeding the system/

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Re: c5 fuse box b

Post by scas »

just looking at this-
viewtopic.php?f=3&t=59281&hilit=10+time ... 15#p573444

so i need to bleed it by turning the steering wheel, i thought the 2 systems were not directly connected. i presume im wrong?

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GiveMeABreak
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Re: c5 fuse box b

Post by GiveMeABreak »

scas wrote:
29 Feb 2020, 15:52
yes loads of fluid. i loosened the small metal hydraulic line on the front of the pump and fluid came out-no air. is there a way of bleeding the system/
The steering is supplied with LDS from the same reservoir as the suspension, but they are entirely different circuits.

To bleed the system follow my guide here from the relevant part on bleeding after the refitting section:

viewtopic.php?p=636386#p636386