A/C compressor not getting voltage? Help please!

[Massamluke]

Hi guys- help needed

Mk1 fabia vrs, aircon hasn't been working since I got the car last year

The 5a fuse is good, the system has been regassed and the pressure switch changed

Measures voltage going to the solenoid on the compressor/pump and I'm getting nothing

I was thinking the heater controls/module

Any ideas?!

Thanks

[Tech1e]

More likely a break in the wiring, any fault codes?

[Breezy_Pete]

Have you checked that the wiring isn't  broken at the next junction, a plug/socket pair on a bracket on the front of the gearbox? Connectors are brown I believe.

[Massamluke]

I havnt checked for fault codes yet, only just found out this afternoon so done some basic checks

I would check continuity from the control unit but couldn't find a guide on how to remove it- don't wanna break it!

I'll have another visual inspection tomorrow

Thanks!

[cyberglass]

under the car on the passenger side bolted to the gearbox there are 2 connectors.  1 for air con the other from the alternator. the wiring into the connectors degrades and breaks. Check this first before spending any money on getting it plugged in ect.

Mine broke a few weeks back so I rewired both connectors over the top of the engine using speaker wire and heat shrink from maplins and cable tied them to the bonnet release cable to keep it tidy and out of the way. you will need to take the air box off to pull the cable up if it is that.

[Massamluke]

Cyber glass you were bang on

Fixed it last week and forgot to update! One connector corroded (ac compressor) and the other has totally corroded and broken off at the plug, got the ac working, just need to rewire the plug for the alternator - car seems to be running and charging fine, what's the alternator wiring for?

Thanks for your help!

Luke

[Breezy_Pete]

Cyber glass you were bang on

Fixed it last week and forgot to update! One connector corroded (ac compressor) and the other has totally corroded and broken off at the plug, got the ac working, just need to rewire the plug for the alternator - car seems to be running and charging fine, what's the alternator wiring for?

Thanks for your help!

Luke

 

The blue wire supplies current to the alt to help it start up, if broken you won't see battery light in clocks when ignition is turned on.

The other wire tells the engine ECU how hard the alternator is working (electrical output as a percentage of its capability at any given rpm).

[alesypalsy]

hi guys, i am having exactly the same problem with a fabia 3 i just brought other day ,,  does anyone know where i should check for the dead wire?  The fuse is ok, but the compresser is not getting any power!  its exactly the same as the post here!  but mine is a 2007 fabia 3

please advice if possible,, i have not checked the pressure sensor as i dont know where that is?

thanks

[alesypalsy]

Hi have just been informed my Fabia is a mk2 , does any one know if this would be the same place to look for broken wire and would I need to remove plastic engine tray to see the gear box , I don't have ramp so need to get underneath to do this,

please advise guys 

thanks