russj249 2 Posted June 8, 2009 Report Share Posted June 8, 2009 I have got the air con with the 2 round buttons and twin heat/cold buttons. Think they say NOR and MAX. Not the single button that says AC.I have no power down to the clutch, but if i run a bridge wire straight from 12v+ at battery it cuts in straight away.Where is the relay or fuses for this.. Just has it re-gasses today so know that's ok. Link to post Share on other sites
russj249 2 Posted June 8, 2009 Author Report Share Posted June 8, 2009 Ok.. i think i found a relay..it's relay number 1.. which is the top left of the relay bit above the fuses..Can anyone tell me a number of the relay or which wires i can bridge to test it? Link to post Share on other sites
legvw 0 Posted June 8, 2009 Report Share Posted June 8, 2009 http://www.rowand.net/Shop/Tech/images/RelayWiringGuide.jpgBasically a relay, 86 and 85 will switch relay on or off, 30, 87 and 87a are switched. Try bridging 86 and 85 on the relay to make it click. Or try bridging 30, and 87/87a on fuse box to make a/c work. Link to post Share on other sites
russj249 2 Posted June 8, 2009 Author Report Share Posted June 8, 2009 Ok thanks mate.I don't have a relay to test it with that's my problem. I will bridge it now with 30 and 87... see what happens. Will keep you posted. Link to post Share on other sites
russj249 2 Posted June 8, 2009 Author Report Share Posted June 8, 2009 Ok i've got 14v with engine running down at the fusebox. As you look at the relay slot.. there's 8 slots numbered 1(top left) to 8(middle bottom)I have power have the power coming from number 6 which is middle row on the right.What ever i put it in, nothing happens, except when i put it in number 7(bottom left small pin) i blew the 30A fuse for rad fan and aircon (num19)Need help! Link to post Share on other sites
legvw 0 Posted June 8, 2009 Report Share Posted June 8, 2009 1,2,3 and 5 are all the switch, so 4,6,7, and 8 are the slots you need. 6 and 8 need to be linked, and 4 needs to be linked to 5. Try that! Link to post Share on other sites
russj249 2 Posted June 8, 2009 Author Report Share Posted June 8, 2009 so i need 2 jumper wires then to get it to kick in.1st wire from 6 to 82nd wire to 4 to 5if i can get confirmation i'll try it before it gets too dark Link to post Share on other sites
legvw 0 Posted June 8, 2009 Report Share Posted June 8, 2009 Yeah i think thats right. I'm going off this pic http://www.performance-cafe.com/images/171959141a.jpg Link to post Share on other sites
russj249 2 Posted June 8, 2009 Author Report Share Posted June 8, 2009 well thats definitely the right relay that goes in.. I've sent the pics to my mate who's an electrician just to make sure.. not that i dont trust you but haven't got another 30 amp fuse if i blow it.. again Link to post Share on other sites
russj249 2 Posted June 8, 2009 Author Report Share Posted June 8, 2009 Ok..I have turned engine on and bridged terminals 6 to 8. Nothing.. then with those still connected, bridged 4 and 5..the air con didn't engage. But no fuses blown or anything and done what i was told on here. Link to post Share on other sites
legvw 0 Posted June 9, 2009 Report Share Posted June 9, 2009 If its not workingb there, move down the line. i.e must be from the relay to a/c pump. Can you check for 12v with all bridges in at the wire going to the pump? Link to post Share on other sites
Afondo 0 Posted June 9, 2009 Report Share Posted June 9, 2009 Dont forget the system has a pressure switch, if its disconnected, faulty or the system is under filled the AC will not engage.I wouldnt reccomend bridging any more pins if you are not 100% certain what is what. If you kill a switch or sensor you will not be happy!!If your mate is an autosparky then just get him to check it. Right now its probably something small, most probably the pressure sensor.Really not worth trying to fix it if your not certain about what you are doing. I hope I dont sound like a cnut but it will be more expensive in the long run if you cook something blindly bridging cables. Link to post Share on other sites
russj249 2 Posted June 9, 2009 Author Report Share Posted June 9, 2009 Ok. at work today i had a look on autodata.It says that that relay 1 is a cut off relay and in brackets "if fitted"So, it might not be that.I have also found out the the clutch operation gets it's signals directly from the tripple plate pressure switch located on condenser? at front left of the engine.Is there anyway that i can run a jumper wire accross this switch to try and get the power. Could be faulty pressure switch as it hasn't been filled for ages I dont think. Link to post Share on other sites
Afondo 0 Posted June 9, 2009 Report Share Posted June 9, 2009 Ok,The condensor is the front radiator (the smaller thinner of the two).The sensor will be screwed in there or into one of the pipes leading to it. you can trace the pipes from the compressor. If the sensor is a two wire unit then you can unplug it and bridge the two wires to test. If it is a 3 wire unit then you will have to check the Bently manual for the test procedure.At any rate if the sensor is the culprit you will loose all the gas from the system when trying to change it. If you do decide to change the sensor yourself, dont let the gas out at high speed but slowly from the charge connectors. Draining the gas quickly from a pipe or connector close to the ground you will loose the oil in the system and damage the compressor if you dont replace the lost oil from the system.Hope that helps..... Link to post Share on other sites
russj249 2 Posted June 9, 2009 Author Report Share Posted June 9, 2009 Afondo that's great.I was pretty sure it was something to do with that.I will check it tomorrow and see if it is a 2 or 3 pin plug. Hopefully it is a 2 pin.The gas side of it isn't a problem. The company next door to me at work is specialist in heating and aircon (not cars but have equipment to do cars) and do my aircon re-fills for free.Will check on bently manual if it is a 3 pin plug anyway.Will do what you said and check everything that i can find off autodata. Just hope it's just the plug. Link to post Share on other sites
russj249 2 Posted June 12, 2009 Author Report Share Posted June 12, 2009 Good news!! Air con is fixed..Never thought to look in engine bay for fuses and relays. The culprit was a relay behind the expansion tank that had worked loose! That's all it was. Simple fix! Push it in Link to post Share on other sites
legvw 0 Posted June 13, 2009 Report Share Posted June 13, 2009 Sorted mate! Now you just need some sunny weather to test it lol!! Link to post Share on other sites
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