Burned out high speed fan connection

[rocknrod]

The one that goes in the fan is beefed up. The old one looks like some 1930's coil or something.

I have one more question about the GT 500 fan. Do y'all know if the resistors are beefed up on it? I've heard that the resistors on the stock GT fan are also a weak spot. I'm getting ready to order the dual relay set up from Leash Electronics. Still thinking about replacing the fan with the GT 500 fan. Y'all have moved me beyond being scared to undertake this project, which is way beyond anything I've ever attempted.

 

[rocknrod]

He sure does, but he doesn’t fix the melted connector in the fuse box.

Glad I changed mine before that happened.

 

[thirwin]

I ordered the GT 500 fan and the relays today. I told my buddy who has a 900 HP GT 500 that I'm starting to build my GT into a GT 500 one part at a time.

 

[Autokyrios]

I have one more question about the GT 500 fan. Do y'all know if the resistors are beefed up on it? I've heard that the resistors on the stock GT fan are also a weak spot. I'm getting ready to order the dual relay set up from Leash Electronics. Still thinking about replacing the fan with the GT 500 fan. Y'all have moved me beyond being scared to undertake this project, which is way beyond anything I've ever attempted.

I've found the new fan to be of better quality and design (not just in electronics, too) so I am assuming it's made of more survivable stuff. I don't have anything empirical to go on other than it's lasted me over 7 years without complaint or problem, drag, track and long-distance summer cruises.

 

[thirwin]

This is my relay setup. I’ll have to take the fuse box out to find wire locations I cut.

Picture 1: the large blue and green are going TO the fan. High and low power.

Picture 2: large red wire goes to the battery stud on the fuse box, it needs to be a large gauge. Orange loops battery power back to the relay. The small blue and green are the ground triggers from the computer to turn the relay on like stock.

Picture 3: Again, the ground triggers blue and green from the computer. The brown wire is for my EPAS rack. View attachment 99900

I installed the new SVT fan, and I received the dual relays and fuses from Leash, but I have one more question about the gauge of the wire you ran to the fan. I called Dan at American Muscle and he said that it calls for 8 gauge wire but he thought that 10 gauge would work. Do you remember what you ended up using?

Thanks

 

[lwarrior1016]

I installed the new SVT fan, and I received the dual relays and fuses from Leash, but I have one more question about the gauge of the wire you ran to the fan. I called Dan at American Muscle and he said that it calls for 8 gauge wire but he thought that 10 gauge would work. Do you remember what you ended up using?

Thanks

I think I used 8ga to supply power to the relay block and 10ga going to each fan power.

I don’t remember exactly though.

 

[thirwin]

Whenever you’re ready, or I’ll try this weekend. I will pull my fuse box and get pictures of what wires I cut.

This is my next question.

 

[lwarrior1016]

This is my next question.

I’m sorry, I totally forgot to do this. I’ll get it this evening.

 

[thirwin]

I’m sorry, I totally forgot to do this. I’ll get it this evening.

No problem sir. Beggars can’t be choosers! I think I’m starting to understand how it will work. I found a wiring diagram that has the abbreviations LG-VT and DB for the wires from the PCM to the relays. I guess that is a color abbreviation.

 

[lwarrior1016]

No problem sir. Beggars can’t be choosers! I think I’m starting to understand how it will work. I found a wiring diagram that has the abbreviations LG-VT and DB for the wires from the PCM to the relays. I guess that is a color abbreviation.

Got you a couple pictures, it’s the best I could get without pulling the tape back. If you need me to open the harness up, I will.

Your signal wires are the two small wires in the white connector. Those are going to ground trigger your relays.


Then the large wires from the fan relays out to the fan are the ones you’ll cut and send over to the new relay output. One of them is going to be the burnt wire. They are in the grey connector.

And then this is where my power supply wire goes.

 

[thirwin]

I think I can get it done now! Thanks to you and the rest of the S 197 community for your assistance. Hopefully I can get it done and report back in a few days. Getting ready to go out of town until a week from today. Thanks again!

 

[lwarrior1016]

I think I can get it done now! Thanks to you and the rest of the S 197 community for your assistance. Hopefully I can get it done and report back in a few days. Getting ready to go out of town until a week from today. Thanks again!

Awesome, I’m glad this will help you. If you do find yourself stuck or just want more information, let me know. I’ll gladly tear it open to get more pictures and a better step by step.

 

[thirwin]

Success! Idling in the garage the low speed fan came on when the ac was on and went off when I turned ac off. As it warmed up the low speed came on. After driving around for ten minutes with ac on I pulled into the garage and checked and the high speed setting had kicked in. Thank you again!

 

[lwarrior1016]

Success! Idling in the garage the low speed fan came on when the ac was on and went off when I turned ac off. As it warmed up the low speed came on. After driving around for ten minutes with ac on I pulled into the garage and checked and the high speed setting had kicked in. Thank you again!

Incredible! I’m glad it worked out. Do you have any pointers or info you’d care to share with the group? Something I didn’t cover?

 

[thirwin]

Incredible! I’m glad it worked out. Do you have any pointers or info you’d care to share with the group? Something I didn’t cover?

I had a little trouble butt soldering the 10 G wire to the original wires that fed into the fan pigtail. If I had it to do over I would have stripped a little more insulation and wrapped the smaller gauge around the heavier gauge. What I did was shove the strands of each wire into the other and then solder. I ended up with pretty thick wads of solder. Another thing I would to differently is attach the module to the strut tower box before hooking it all together. Too many wires in the way after. The relay almost lined up with the holes that were already there.

 

[armend19]

Got you a couple pictures, it’s the best I could get without pulling the tape back. If you need me to open the harness up, I will.

Your signal wires are the two small wires in the white connector. Those are going to ground trigger your relays.
View attachment 100380View attachment 100381

Then the large wires from the fan relays out to the fan are the ones you’ll cut and send over to the new relay output. One of them is going to be the burnt wire. They are in the grey connector.
View attachment 100383
And then this is where my power supply wire goes. View attachment 100382

I just want to get the right wires correct.The large wires in your picture are green/yellow and green/purple coming from the gray connector? and the green and blue wire coming from the white connector are the ground/trigger wires?

 

[TexasBlownV8]

I have one more question about the GT 500 fan. Do y'all know if the resistors are beefed up on it? I've heard that the resistors on the stock GT fan are also a weak spot. I'm getting ready to order the dual relay set up from Leash Electronics. Still thinking about replacing the fan with the GT 500 fan. Y'all have moved me beyond being scared to undertake this project, which is way beyond anything I've ever attempted.

I've been running 2013 GT500 fans in 2 Mustangs for years in a 2005 and 2007, using whatever resistor came with it, with no issues. Definitely a good upgrade over the stock fan. You do have to trim off something for the power steering reservoir to fit right, but that's easy to do (snip off a plastic tab with wire cutters or something like that); if your reservoir is relocated or not present, it's not an issue.

 

[lwarrior1016]

I just want to get the right wires correct.The large wires in your picture are green/yellow and green/purple coming from the gray connector? and the green and blue wire coming from the white connector are the ground/trigger wires?

View attachment 100784

View attachment 100785

View attachment 100786

Yes, that is correct. It looks like yours has burnt the low speed and high speed out. Good grief.

 

[armend19]

Yes, that is correct. It looks like yours has burnt the low speed and high speed out. Good grief.

So I finally did mine. And now the fan only turns on when I turn on the AC. It doesn't turn on any other way, and I saw the coolant temp go up to 210f. I also replaced my fan. Any help is appreciated.

 

[lwarrior1016]

So I finally did mine. And now the fan only turns on when I turn on the AC. It doesn't turn on any other way, and I saw the coolant temp go up to 210f. I also replaced my fan. Any help is appreciated.

Do you have a test light or multimeter? Can you post some pictures of how you have everything wired?