Towing temps mid 90's ambient temps - Page 2 - Ford Powerstroke Diesel Forum
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post #11 of 16 Old 08-26-2019, 05:25 AM
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Can some one explain and point me to the 'blue wire mod'?...Sounds like something I may want to do.

Steve
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post #12 of 16 Old 08-26-2019, 06:24 AM Thread Starter
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Can some one explain and point me to the 'blue wire mod'?...Sounds like something I may want to do.



Steve
From what I have found there is a blue wire that goes to your fan. You pretty much splice into the wire do not cut just splice. Run the wire to a toggle switch and then run another wire from the switch to ground. In my case I have to get a relay since I am going to use my uplifted switch that came with truck. That's pretty much what I understand of how it is installed.

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post #13 of 16 Old 08-28-2019, 04:02 PM
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I switched to 7.3 fan clutch and love it. Temps are definitely lower while cruising flat ground and on hills. I didn't want to be forced to constantly watch my gauges looking for when to flip the switch. I towed 16-17k lbs in 105-115 degree heat on 4th of July weekend and was sitting around 199-205 ECT on flat ground.

On hills it holds the heat out sooner so I can pull the grades at speed for longer periods. My current tune has a lot of fuel in it causing it to get hot on hills, but it shifts so perfect that I haven't wanted to mess with it.

The noise is more apparent as rpm go up. I'd say 2100+. I've only had the fan clutch for 2 months so it's still the honeymoon stage as far as noise goes.

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post #14 of 16 Old 08-28-2019, 05:47 PM Thread Starter
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I switched to 7.3 fan clutch and love it. Temps are definitely lower while cruising flat ground and on hills. I didn't want to be forced to constantly watch my gauges looking for when to flip the switch. I towed 16-17k lbs in 105-115 degree heat on 4th of July weekend and was sitting around 199-205 ECT on flat ground.

On hills it holds the heat out sooner so I can pull the grades at speed for longer periods. My current tune has a lot of fuel in it causing it to get hot on hills, but it shifts so perfect that I haven't wanted to mess with it.

The noise is more apparent as rpm go up. I'd say 2100+. I've only had the fan clutch for 2 months so it's still the honeymoon stage as far as noise goes.

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I think this is what I ultimately want to do I just want to see if the switch will make a difference.

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post #15 of 16 Old 08-28-2019, 06:55 PM
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You'll notice a difference. It definitely helps.

Prior to switching I installed a brand new duralast fan clutch. It was weak right away and my temps were hot. Mid trip I stopped at an auto store and grabbed a switch and wired up the blue wire mod. It helped for the sake of the trip, but the clutch died completely on the way home. Not from the blue wire mod, but from a subpar clutch.

I went 7.3 style immediately afterward, because they tend to completely lock when failing. I also wanted peace of mind knowing anybody else could get in and tow the trailer home if something happened to me.



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post #16 of 16 Old 09-24-2019, 03:19 PM Thread Starter
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Ok so I wanted to give a update using the blue wire mod made a big difference. I pretty much could turn it on listen for it to turn on then turn it off . By time it shutdown it would be at good temps.

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