Does anyone have a wiring diagram to do this? I know it is supposed to be wired thru the AC Switch. Also any ideas what these fans cost and where I would get them. I did see one in a junkyard on a volvo and can take it off the next time I visit that place. Noticed it had 2 wires that go to a connector that was plugged in into another connector. Does this mean my volvo will have a connector dangling somewhere near the condensor for me to hook up the fan ?

thanks in advance.
zakir
volvo 240DL, 1990

I bought my fan from Summit racing, they have an online store and have a wide selection of fans. I think mine was 14", but it may have been 16". I paid about $50 or so, I think. (I also converted over to an electric main fan at the same time)


I don't have a wiring diagram, but I can tell you what I did.

I found the wire going to the AC compressor clutch. I think it's a green wire, and it runs from the compressor back toward the firewall (I think it disappears into a wire bundle at some point). At any rate, this wire is energized whenever the AC control unit wants the compressor to be running. It should first go to a condenser overpressure switch, and then to the compressor clutch. (The overpressure switch cuts the compressor off if the pressures get too high). At any rate I spliced into this wire, using it as a signal to a relay. The relay is what actually carries the current load of the fan (driving it directly from the clutch circuit may be too much for the fuse/circuit to handle).

If I remember correctly I tapped into the signal wire before it gets to the overpressure switch- this way the fan will still run if the system pressure gets too high (when you need the fan the most!).

My eyeballs just about popped out of my head when I saw the A/C pressure drop to the floor when I turned the fan on manually. It makes a difference.

Good luck on a worthwhile conversion.

-Steve

Thanks for the info. exactly what I needed to know. I wonder if the relays on the volvos are color coded for the current capacity, I am thinking of picking it up from the junkyard.

get a pusher fan off a 740. i installed one on mine. instead of installing it on the AC system, find a wire to tap into that comes on when the key is turned on. this will help keep the car cool during the hot days you don't run the AC. i routed mine to one of the wires on the passenger side of the firewall. get yourself a connector block that will blow in case of power spike.


bubba
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what...???...me worry??

I did see a lot of these fans in the junkyard on the 740's. I think I will get one. Thank-You

you are welcome. when you get it home, make sure you get a good relay (that's what i was getting at in my previous post but couldn't think of it) connect one wire to the positive of the battery and the other to a wire that only comes on when the key is on. remove the grill from the front of the car and remove the bolt that holds the horn assembly. seperate the horn pieces and mount both on the right side of the stalk at the bottom in one of the holes there. while you're at the junk yard, get yourself a few of these bolts to have on hand. bolt the fan on the left side. it will align itself into pre-drilled holes.

enjoy.


Bubba
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what...???...me worry??

What pre drilled hole are these and where are they located?
We went to our mech. to pick up the volvo and he showed me the different mounting points between the 740 and 240. Both had pusherfans on them. I just don't see how you could mount a 740 fan on a 240.
Thanks,
Jacob

you'll need to remove everything from the center stalk and possibly something from the left side. put the fan in and see what/where will line up. it may need to ride a bit high. bolt in and reattach the goodies removed where will fit.

good luck.
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what...???...me worry??

Thanks for replying,
I actually got the 740 fan to fit in there after some cutting of the fan bracket. There were no holes that lined up perfectly.

Thanks,
Jacob