Thank you for posting this video! I just came home from getting a new alternator installed into my 2016 Genesis Coupe 3,8 Ultimate ed (/w only 24K miles) and he confirmed that my fan won't stop running. They wanted to charge $350 just for the electrical diag and it would have put my bill into the $1K range, so I told them I would look into it myself or bring it back later. Now i'm just going to go buy a few relays/tools and do it myself.
Great video. Had this happen to my 2013 Genesis Coupe and it took me a while to figure out that it was the relays. Another tip is, if you don't have new relays yet, sometimes tapping them with a stick or similar will get them to switch off. You can try that instead of disconnecting the battery till you get new relays.
I WISH I had seen this a few weeks ago. Kyle Steele Hyundai got me for over $800 for this simple fix. My AC would stop cooling when at idle because my fans weren't kicking on, and the engine was beginning to overheat. Turns out my relays were shot. The service advisor misled me about what was wrong and made it sound like more than it was. Once I saw the service record, I was less than pleased. $193 for two relays, $630 labor.
Mr Paul dude I have a question I went to the gas station to fill my car the other day and the numbers fluctuate back and forth the distance from empty would fill up to 287 and it would drop down to 275 and then go back up to 287 and it will stay but not I’m confused what it is great video by the way I gave it a like and mine is a bk2 2013 Genesis coupe
You have any info on the fan not coming on? Runs fine if I provide power manually. Currently have the hi relay wired to an ignition source, into an aftermarket relay, to engage it.
@@ProdigePerformance and as far as continuity, across which component? I checked the relays to ensure they where all still providing the proper routing by checking continuity
@@DivineBk2 probe the harness It should be red green black Black should be ground Red should be constant And the green should be a trigger So if you take off the main plug let the engine temps get half way and probe each wire If the harness isn’t getting power at the green wire then trace it back or use a circuit breaker to find the break in the wire Same with the red wire
Hey man I want to get my genesis fbo and on e85 and some other stuff too. The car already has a full ECU/TCU tune done by alpha speed. Also has some basic mods done like exhaust, fuel injection, air intake, aero body kit. I tried contacting you instagram but didn’t work out. Let me know if you can help me out. God bless 🙏
Hey im currently looking into moding the genesis coupe 3.8 i was wondering how easy it was to push out 500whp, if so would i need to build the bottom end or will it still be reliable and if so what modification would you recommend. Im farly new to the whole car community. I just dont want to mess up to bad sence its my only car rn
I can answer this, my bk2 3.8 on E85 fbo and ported manifold pushes 315WHP and it’s def fun. If you want 500whp your gonna need to get better pistons and rods, push like 6 psi of boost etc. you can do it without the rods and pistons but it prolly won’t last too long. I’ve looked into getting a spacer to lower compression ratio cuz it’s super high in these GDI cars. If I had unlimited money I’d do a whole rebuild like that but I have higher priorities. 315 with a stage 3 spec clutch and short shifter, LSD and fat tires are still plenty enough for me to have fun. Currently keeping up with scatpacks and mustangs so def still fun.
Hey just started getting into cars and I have a question I thought you could answer… I have a 5.7 Hemi magnum from an old truck would it be possible to swap it into my 2015 3.8??
@@slainassasin4723 welp you can’t turbo it anymore. They discontinued turbo kits for the 3.8s And nobody will tune a SC 3.8 because of reliability So you’re left with either fbo or some swap of some kind
@@ProdigePerformance damn that’s disappointing to hear I just started learning about cars so I didn’t realize superchargers aren’t as reliable as turbos. It will be a while before I buy anything maybe I’ll find a used turbo kit or something like that idk
What if your fan doesn’t come on at all ? I replaced the relays and cooling fan resistor . A shop told me those were the two issues. My heat works from the a/c but doesn’t blow cold as well
Fans have 0 relation to AC stuff lol. So toss that out you’ll get confused. Give the fan itself power and ground. If it turns on then it’s a wiring / relay issue If it doesn’t then your fan motor shit the bed
Did u find I fix I’m experiencing the same thing. My car only blows hot air but my car doesn’t overheat or anything. But my fan doesn’t turn on when I turn the ac on
@@tacos1234 the 2.0T compressors always run. They don’t have a disengage wheel. Hint that’s why when people do ac compressors replacements they have to fill the system at the same time otherwise you’ll blow the new compressor under load since the clutch is always in rotation
Nah I had to do it on this genesis since the ground cable was kinda … let’s just say it was welded by the customer prior coming to me lol. So in my case when I make these videos I kinda go through them fast and yeah you typically want to remove the negative over the positive. Just it didn’t hit me when I was editing so good catch
So my problem is the fan never turning on, even when coolant temps are at 185 F , which resulted in overheating. Thermostat works cause the coolant flows after a certain temp. I’ve tried AC on, defrost on, nothing. Fuse isn’t blown and I’ve replaced the entire radiator fan shroud at this point. I’m starting to believe it’s these relays too lol
Hey, had the same issue you are describing, it was the dumb relays. I end up swapping to confirm and the new fan ran. Trying to find replacements at this point but the fan is working.
Thank you for posting this video! I just came home from getting a new alternator installed into my 2016 Genesis Coupe 3,8 Ultimate ed (/w only 24K miles) and he confirmed that my fan won't stop running. They wanted to charge $350 just for the electrical diag and it would have put my bill into the $1K range, so I told them I would look into it myself or bring it back later. Now i'm just going to go buy a few relays/tools and do it myself.
and it worked. After buying a few used relays from eBay, I was able to fix it myself. Thanks to this video and some advice from a reddit post.
Great video. Had this happen to my 2013 Genesis Coupe and it took me a while to figure out that it was the relays. Another tip is, if you don't have new relays yet, sometimes tapping them with a stick or similar will get them to switch off. You can try that instead of disconnecting the battery till you get new relays.
dude hell yeah you saved me time and money!!! thanks so much bro
@@JenryMercado Eyy, that's awesome. Glad that helped you out. Keep in mind you'll still have to get it changed though, this isn't a permanent fix.
@@VmaxVibes yeah im definitely gonna have a spare just laying around for when the time comes does my dude!
I WISH I had seen this a few weeks ago. Kyle Steele Hyundai got me for over $800 for this simple fix. My AC would stop cooling when at idle because my fans weren't kicking on, and the engine was beginning to overheat. Turns out my relays were shot. The service advisor misled me about what was wrong and made it sound like more than it was. Once I saw the service record, I was less than pleased. $193 for two relays, $630 labor.
Thanks man. Haven't had this happen yet but I'm adding to my just in case files .
Mr Paul dude I have a question I went to the gas station to fill my car the other day and the numbers fluctuate back and forth the distance from empty would fill up to 287 and it would drop down to 275 and then go back up to 287 and it will stay but not I’m confused what it is great video by the way I gave it a like and mine is a bk2 2013 Genesis coupe
Would swapping those relays fix the issue of my A/C not blowing cold air?
Really thank you bro
Hi can you please make a video showing the sunroof drain locations and how to unclog the sunroof drains. Thank you so much
You have any info on the fan not coming on? Runs fine if I provide power manually. Currently have the hi relay wired to an ignition source, into an aftermarket relay, to engage it.
@@DivineBk2 have you tried to do a breaker test or check for continuity by chance
@@ProdigePerformance I haven’t. To be honest I’ve never heard of these things. I’ll get to googling. Haha
@@ProdigePerformance and as far as continuity, across which component? I checked the relays to ensure they where all still providing the proper routing by checking continuity
@@DivineBk2 probe the harness
It should be red green black
Black should be ground
Red should be constant
And the green should be a trigger
So if you take off the main plug let the engine temps get half way and probe each wire
If the harness isn’t getting power at the green wire then trace it back or use a circuit breaker to find the break in the wire
Same with the red wire
I fix it, bro. Just take five minutes all thank you.
Hey man I want to get my genesis fbo and on e85 and some other stuff too. The car already has a full ECU/TCU tune done by alpha speed. Also has some basic mods done like exhaust, fuel injection, air intake, aero body kit. I tried contacting you instagram but didn’t work out. Let me know if you can help me out. God bless 🙏
Hey im currently looking into moding the genesis coupe 3.8 i was wondering how easy it was to push out 500whp, if so would i need to build the bottom end or will it still be reliable and if so what modification would you recommend. Im farly new to the whole car community. I just dont want to mess up to bad sence its my only car rn
I can answer this, my bk2 3.8 on E85 fbo and ported manifold pushes 315WHP and it’s def fun. If you want 500whp your gonna need to get better pistons and rods, push like 6 psi of boost etc. you can do it without the rods and pistons but it prolly won’t last too long. I’ve looked into getting a spacer to lower compression ratio cuz it’s super high in these GDI cars. If I had unlimited money I’d do a whole rebuild like that but I have higher priorities. 315 with a stage 3 spec clutch and short shifter, LSD and fat tires are still plenty enough for me to have fun. Currently keeping up with scatpacks and mustangs so def still fun.
Where did you buy the parts? I can't find it anywhere.
@@lizbeth072676 if you type in the part number that’s on the relay you’ll find it at your local parts store or even Amazon
Hey just started getting into cars and I have a question I thought you could answer… I have a 5.7 Hemi magnum from an old truck would it be possible to swap it into my 2015 3.8??
You can swap anything with money, you’d be essentially doing it from scratch though just a heads up
@@ProdigePerformance I’ll be happy with any build around 400 hp just exploring options on either to swap, turbo or supercharge
@@slainassasin4723 welp you can’t turbo it anymore. They discontinued turbo kits for the 3.8s
And nobody will tune a SC 3.8 because of reliability
So you’re left with either fbo or some swap of some kind
@@ProdigePerformance damn that’s disappointing to hear I just started learning about cars so I didn’t realize superchargers aren’t as reliable as turbos. It will be a while before I buy anything maybe I’ll find a used turbo kit or something like that idk
@@slainassasin4723 tk turbo kit or remnant performance would be the ones to look for boss
What if your fan doesn’t come on at all ? I replaced the relays and cooling fan resistor . A shop told me those were the two issues. My heat works from the a/c but doesn’t blow cold as well
Fans have 0 relation to AC stuff lol. So toss that out you’ll get confused.
Give the fan itself power and ground.
If it turns on then it’s a wiring / relay issue
If it doesn’t then your fan motor shit the bed
Did u find I fix I’m experiencing the same thing. My car only blows hot air but my car doesn’t overheat or anything. But my fan doesn’t turn on when I turn the ac on
@@tacos1234 again. It’s not related to the fan lol.
So you don’t get cold air with the AC on?
@@ProdigePerformance no I get no cold air. I filled it up with Freon and the compressor is running but I still get no cold air.
@@tacos1234 the 2.0T compressors always run. They don’t have a disengage wheel. Hint that’s why when people do ac compressors replacements they have to fill the system at the same time otherwise you’ll blow the new compressor under load since the clutch is always in rotation
By the way, i usually remove my negarive terminal when i disconnect the battery, should i be removing the positive?
Nah I had to do it on this genesis since the ground cable was kinda … let’s just say it was welded by the customer prior coming to me lol.
So in my case when I make these videos I kinda go through them fast and yeah you typically want to remove the negative over the positive. Just it didn’t hit me when I was editing so good catch
@@ProdigePerformance Oh okay good to know. Thanks! Keep up the good work on these videos 🙏🏼
@@VmaxVibes I’m trying, got a lot to edit just extremely busy unfortunately. But will make it !
I just put my ac mode on defrost mode then turn it off and turn it on air form inside and it usually works
So my problem is the fan never turning on, even when coolant temps are at 185 F , which resulted in overheating. Thermostat works cause the coolant flows after a certain temp. I’ve tried AC on, defrost on, nothing.
Fuse isn’t blown and I’ve replaced the entire radiator fan shroud at this point. I’m starting to believe it’s these relays too lol
Hey, had the same issue you are describing, it was the dumb relays. I end up swapping to confirm and the new fan ran. Trying to find replacements at this point but the fan is working.
@@gencoupe3.8 did you buy OEM? or generic 4 pin switch relays at the correct amperage work?