Pedro85 Posted September 3, 2016 Share Posted September 3, 2016 (edited) Hi guys, me again I recently had my engine swapped out after it went bang, after a fair bit of effort the engine is now running really nice. I haven't been able to take it for a long drive since i got it back though, so i took it out last night for half an hr to give it a good run. I noticed that when i put the air con on the radiator fan didnt kick in, which makes me concerned that neither are working. I swapped out the 40A fuse for the rad fan in the fuse box infront of the battery and the 10A fuse for the A/C in the hidden box behind the battery with known working fuses but that hasn't solved it. Any ideas on what could cause this when doing an engine swap? When i got the car back the battery terminals were overtightened, meaning they weren't secure and i had intermittent power drops until i was able to secure them on properly. After the battery has been disconnected and you start the car for the first time the A/C is always on as default, could something have blown when i started the car for the first time? Also it should be noted that i have the mishimoto fan shroud. The garage that did the work is closed at the weekend so if i cant sort it by monday illl just take it round for the guy to have a look at. Thanks! Edited September 3, 2016 by Pedro85 Quote Link to comment Share on other sites More sharing options...
Pedro85 Posted September 3, 2016 Author Share Posted September 3, 2016 Ive been reading up a bit more. I see that there are three relays in the IPDM that cover the rad fans, should they "click" when i put the A/C on when the ignition is on but the engine isnt running? Its hard to hear when the engine is going. Thanks Quote Link to comment Share on other sites More sharing options...
PageyUK Posted September 3, 2016 Share Posted September 3, 2016 Can you not put a multimeter onto the fan plug to see if there is voltage? Then just work your way backwards.... Quote Link to comment Share on other sites More sharing options...
Pedro85 Posted September 3, 2016 Author Share Posted September 3, 2016 I don't have one handy unfortunately, i can get one from work on monday but by then i'm probably just best taking it back to the garage. Quote Link to comment Share on other sites More sharing options...
chippychip123 Posted September 4, 2016 Share Posted September 4, 2016 Sounds silly but have you checked there plugged in? As if the garage removed the front panel to replace the engine then they have had to un plug them! Also if they did remove the front panel then they would have had to let the gas out the air con, which I'm pretty sure also stops the fans coming on untill re gassed Quote Link to comment Share on other sites More sharing options...
Pedro85 Posted September 4, 2016 Author Share Posted September 4, 2016 The fan shroud itself is plugged in, i tried swapping the plugs around in case they were in backwards but there was no difference. Im not sure about the air con gas, if i cant sort this today ill ask the garage about it. Im just away to pull the center console to check that the cabin controls are connected properly, they would have had to mess about under there to disconnect the gearbox i imagine. Not sure what else it could be. The engine hasnt overheated, the temp gauge was steady sitting just under half way when i was driving it so i might run the car up to temp and see if the other fan kicks in, in which case it would just be a problem with the a/c fan. Cheers Quote Link to comment Share on other sites More sharing options...
chippychip123 Posted September 4, 2016 Share Posted September 4, 2016 I'm pretty sure if the gas is low then the relays don't click or anything, they may have regassed it but the two connections under the air box are a bit of a pain and mine had popped apart as there a strange push fit connection If the fans are working on engine temp then I think it could possibly be this! Quote Link to comment Share on other sites More sharing options...
Pedro85 Posted September 4, 2016 Author Share Posted September 4, 2016 (edited) Right a bit more info: I took the car for a 10 min drive to get it up to temp, then let it idle for a while when i got back. The temp gauge still didnt go up past just below the halfway point but the fans never kicked in. I could feel the coolant hoses getting really hot so i backed out and turned the car off. I noticed that when you put the rear window de-mister on there was an audible click heard in the cabin, but when i hit the a/c button there was nothing. Maybe there isnt meant to be but i wanted to have a look at the relays so i got into the IPDM again. When trying to remove the top relay i accidentally popped the little "cap" that covers it, rather than removing the relay itself, and presto the drivers side fan kicked in. This is without the engine running. So i removed all three and took off the caps, reinstalled them and manually operated the relays. When the top relay is closed, the drivers side fan activated. When both of the other two (bottom and middle) were closed the passengers side fan activated. So the fans are working fine. Either the relays are faulty or it would seem they aren't getting the signal to close for some reason. Cheers Edited September 4, 2016 by Pedro85 Quote Link to comment Share on other sites More sharing options...
Pedro85 Posted September 9, 2016 Author Share Posted September 9, 2016 So it turns out the cooling fans are fine, i just backed out too early when letting the engine heat up. I put it back to the mechanic last night, he said he checked it over and found nothing wrong, so he let the car heat up and the fans came on just like they should. The only thing now is the A/C fan not working, the mechanic told me low gas pressure could prevent it from working, does that sound right? Cheers Quote Link to comment Share on other sites More sharing options...
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