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Been a while since anyone has posted on this thread....I'm about to do this and need a little help.
Iv'e read through the whole thing and can't seem to get a straight answer. I'm going to use a 40amp relay for the low power setting on the fan, I got that much.
It's going to go to a 3 way toggle. On-off-on. My question is what has worked best for the high side of the relay?? I can't seem to find an 80amp at the parts store I work at. and can only find a select few online. It seems like people had problems with the ford starting solinoid. Can someone please straighten me out on what to get here. Thanks in advance.
I use two relays....one 30 amp relay that toggles the fan on/off. and the other that toggles between low/high. This gives me two toggle switches, on/off and low/high. I prefer it this way so I am able to turn the fan on/off if needed.
I run the fan on high 99% of the time and never had any issues. I also run the larger 30 amp fuse (not the flat style). Never had an issue there either.
A Ford starting solenoid is not continuous duty, so that's why it burns out on the high side of the fan. I went thru the parts list at my NAPA store and found a continuous duty solenoid, I believe it was from a winch or a snow plow. Solenoids like that are big relays anyway. Works without a hitch. I use an on-off-on switch (forget what they are called, DPDT?) to control both low and high speeds with one switch.
There was a lengthy discussion in my build thread a while back.
http://www.mallcrawlin.com/forum//sh...562#post292562
FWIW, I've got a 40a relay on the high side, 30a on the low side. So far, it's been trouble free.
So you running 2 toggles will do the same thing as me running 1 toggle that is 3 way.... low-off-high. I just get confused at how to wire with relays...it's a new concept to me.
That's the route I will be going too.
Thanks for the link. I'm not running mine to my ignition or to a temp switch. Anyone have a wiring diagram on how to do it with the 2 relays and 1 toggle. I've done countless searches (maybe i'm dumb) but just can't find the way I want to wire it.
mega bump. Im looking to do the same fan mod. Im sick of this thing over heating. The junkyard has a 5.9 hood and fan so i might pick them both up.
Bookmarked for reference, thanks for all the good info guys
Dave
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