Thread: Wiring AC fans to AC switch??

They are AC fans & continue to run with Ign. off to drop the system HP as well as clear the hot air out of the bay as well, I guess.

Originally Posted by 4bee

Very droll.
I'm not sure if these motors will run if wired 'back to front'. ladas would know.
Reverse the spades & see I suppose.

Yes they should run 'back to front' - so even if you have connected them up in the wrong direction they would still run - if they were working.

Originally Posted by Utemad

My 1994 D1 V8 manual aircon fans definately come on when the aircon is running (fans run constantly with aircon). I have had them also run after low range work on a hot day. They even continued to run after I switched the engine off and removed the key (only ever did this once). I can't see much point in the fans running when the coolant isn't circulating though.

There is a run on timer diode in the circuit - that as stated before brings the pressure of the gas down after stopping - as you don't want a compressor to start up with high head pressure - could cause damage, and it also helps engine cool down a little, there is quite a bit of residual engine bay heat when you stop.

Originally Posted by amshaw

Yes ....I ran a wire from battery + & another wire from Battery - to the fan plug both with spade type terminals, male & female to suit the plug.....

I did check to see which plug I had....I thought if there is power in the plug I have the wrong one to test the fans

Might double check it all again just to "Be Shaw"......

May be a really daft question ...............but are you "Shaw" that you are connecting +/- to the fan side of the connector - not the supply side......


Yes I know it's a daft remark - but I have seen it done before

Originally Posted by ladas

There is a run on timer diode in the circuit - that as stated before brings the pressure of the gas down after stopping - as you don't want a compressor to start up with high head pressure - could cause damage, and it also helps engine cool down a little, there is quite a bit of residual engine bay heat when you stop.

Thanks. We do the same thing at work (manually) on our big workshop compressor. I probably should have known there would be a similar thing going on under my bonnet.

Originally Posted by Utemad

My 1994 D1 V8 manual aircon fans definately come on when the aircon is running (fans run constantly with aircon). I have had them also run after low range work on a hot day. They even continued to run after I switched the engine off and removed the key (only ever did this once). I can't see much point in the fans running when the coolant isn't circulating though.

ahh but the coolant will circulate from convection cooling and your also pushing air through the engine bay so the block although not very effieciently will dissapate more heat.

Originally Posted by ladas

May be a really daft question ...............but are you "Shaw" that you are connecting +/- to the fan side of the connector - not the supply side......


Yes I know it's a daft remark - but I have seen it done before

No.....I did think of that.....I made sure by testing with a test light and of course the one with power comes from car or fuse box or wherever and the other doesnt have power cos its connected to the fan.....

But I had a good Irish mate test it for me just "to be Shaw to be shaw" had I can now confrim the "The Fans Are Rooted"....so the search starts for replacements.........But I wont have them done for Monady when we leave so Look out LR spare Parts people !

Or does anybody have any kicking around the shed??

Also would it be worth pulling the grill off/out to get better flow through the the ac condenser, auto cooler & Rad?

Might look a little stupid but at least it would get more air flow.....what do you think?