I may need a relay for the aircon, (from inside the under bonnet fuse box) i cannot read the part number on it, the car is a Suzuki Alto SZ4 2012, does anyone either know what the part number is, or where i can find it, i have messed around all afternoon on the internet, i am fighting a losing battle, an off chance i know, but worth a try.
Darrell, thanks for the reply, that is a great site for finding part numbers!, just had a quick google on that part number and it comes up as a fuel pump relay, i will have a look on the site tomorrow when i have more time.
thanks for the help.
Yes i have the38860M79F00 relays in a couple of slots, they are Blue in colour, the aircon one on mine is half the size and White, anyway i tried putting a Blue one in just to see if it worked, no luck, the compressor does not start, i have changed the fuse just to be sure, so this weekend its back to the drawing board, it must be something else that is stopping the aircon starting up.
Well the aircon was working when i last tried it, at the weekend i will test if power is getting to the clutch, i will get my voltmeter out, if not i will remove the relay and use a piece of wire to test if the clutch is pulling in and out, of course i will test to see if the clutch is free first, i simply tried the fuse and relay first, because it is easy to get at and would have been silly not to try the simplest first!
There are a couple of pressure switches in the loop as well.
Jumping with an un-fused chunk of wire is dangerous. keep in min there are 2 circuits in the relay socket, a control and a load.. The BCM may not look kindly if they are crossed.
Ok, i am convinced its not a relay or fuse problem, i can just get at the clutch in front of the pulley, and i can turn it, my next move is to see if i have got 12v at the connection near the compressor, i need to get underneath to do this, can't reach it from above, i will be putting the car up on my ramps shortly to change the oil and filter, so i will get the meter out and test the connector at the same time, if i do have 12v there, then i will have to investigate the suggestions by Aquanaut, that will be more difficult.
Bit of a late update on this, only just got around to checking it, fuse ok, relay ok, jumped the relay with a bit of wire and i can make the compressor clutch go in and out, so that is ok, it seems that it either needs re gassing or a pressure switch has failed, does anyone know where the switches are located? or is it better to get the garage to re gass it? can the pressure switches be tested?
Testing the pressure switch is best left to someone with the refrigeration equipment and the know how - you're going to need at the very least a gauge set to verify the system's internal pressures, and if the switch has failed, removal & replacement of the defective switch will require whatever refrigerant is in the system to be captured before the switch can be removed, and the system evacuated & refilled after the switch is replaced.
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