my aux A/C fans have never come on. areas to check? (other than the obvious cut wires, etc.) Also, is the radiator fan or the aux fans suppsoed to run for a short time after the engine is shut off? mine don't, but i know on some cars, they do. i don't know. thanks.
fans supposed to run after engine is shut off?
- Thread starter wade3570
- Start date
aux fans are for air con only. engine fan is a viscous fan unles yours has been changed for electric aswell and dont run on after ignition is off
The fans normally don't run on this car after shutdown but they can be made to with a very simple wiring change under the hood. I did it to mine years ago.
so..how would i wire it to run a little after the engine is off like yours...??
jetjock;1038042 said:
1) Locate the condenser fan relay on the passenger fender. Unplug the connector. All work will be done on the harness side.
2) Cut back the outer harness covering a few inches or until you reach the harness branch.
3) Cut the yellow wire a few inches back from the connector.
4) Remove the insulation from the light blue/red wire at the same distance back from the connector.
5) Connect the yellow wire from the connector to the light blue/red wire. The yellow wire on the harness side is left unused.
The condenser fan relay feed in now hot at all times. The fans will come on when either the AC high pressure switch is closed or when the high temp water switch closes. On a hot day expect the fans to come on several minutes after engine shutdown. They'll run anywhere from 5 to 20 minutes depending on coolant temp. It's also, contrary to what you may believe, good for the battery.
2) Cut back the outer harness covering a few inches or until you reach the harness branch.
3) Cut the yellow wire a few inches back from the connector.
4) Remove the insulation from the light blue/red wire at the same distance back from the connector.
5) Connect the yellow wire from the connector to the light blue/red wire. The yellow wire on the harness side is left unused.
The condenser fan relay feed in now hot at all times. The fans will come on when either the AC high pressure switch is closed or when the high temp water switch closes. On a hot day expect the fans to come on several minutes after engine shutdown. They'll run anywhere from 5 to 20 minutes depending on coolant temp. It's also, contrary to what you may believe, good for the battery.
Mine will run if i shut the car off on a hot day and then key on 10 minutes later, but never when the car is all the way off.
One of the things that contribute to long life in a flooded cell battery is cyclic discharge. Not deep discharge mind you (a single discharge below 10 volts will cut its life significantly) but discharge to 25-50%, preferably at a slow rate. With a properly working charging system that doesn't happen and simply starting the engine doesn't discharge it enough. Course, all this assumes the battery is in good condition and has been properly cared for. I typically get around 8 years out of them. Currently on my third one since the car was new.
Finnon: Upon reflection I find you GE types may not have water switch # 3. If so this mod may not be applicable in it's current form. Iirc the GE doesn't have the big pusher fan either. If all you have is the little fan this mod is basically useless.
For those who do this the fans should never be on with the AC off and the engine running. If you ever roll into some place and shut the engine down to find the fans running you have a cooling system problem.
Finnon: Upon reflection I find you GE types may not have water switch # 3. If so this mod may not be applicable in it's current form. Iirc the GE doesn't have the big pusher fan either. If all you have is the little fan this mod is basically useless.
For those who do this the fans should never be on with the AC off and the engine running. If you ever roll into some place and shut the engine down to find the fans running you have a cooling system problem.
bummer lol i thought itd be a cool mod to try out. I dont have a pusher fan just the 1 small fan to the right hand side of the radiator (facing the car)
Water switch number 3? is that what we would be splicing the wires to trip?
Water switch number 3? is that what we would be splicing the wires to trip?
I use electric fans, and had them wired so that they would come on at a specific temperature, even when the key was off. I didn't know that it would actually extend the life of my battery, so I rewired it to run only when the key was on(once it reached the correct temp., of course). Typically, on a hot day, they would come on twice after I parked. Once about 3 to 5 minutes after shutting off, and again around 10 minutes later. Usually they would stay on for around three minutes each time, iirc.
I think they pull around 20-25 amps on low. Would it be still be okay to rewire it so they come on after I turn the car off?
I think they pull around 20-25 amps on low. Would it be still be okay to rewire it so they come on after I turn the car off?
It'll be fine Cuel. The only problem is if the temp switch fails on and runs the battery down. I avoid that and similar problems by using Priority Start modules on all my cars.
Cool. I'm using a thermatic temp. switch currently. The bulb is in the radiator, up in the top left corner. I set it according to operating temps. taken with an i.r. temp gun. It comes on around 205 deg. at the back of the head, and goes off around 190. I used the temps. at the back of the head as that seemed to be the hottest part of the engine. The temp. up on the t.stat housing, where the other switches are located, seems to be around 198 when the fans come on, and around 185 when it goes off. Works pretty well, but I'd like to get a digital fan controller.
Mind dropping a link to the Priority Start modules? I've seen you talk about them before, but didn't follow up.
Mind dropping a link to the Priority Start modules? I've seen you talk about them before, but didn't follow up.
As you know I'm not a fan (pun intended) of electrics but I'd go with a Spal or Dakota Digital controller. I've used both and each has it's own merits.
Priority Start:
http://tinyurl.com/gs7w5
A similar gadget, the Battey Brain, provides remote control for anti-theft:
http://tinyurl.com/4yllun
Both can be had cheaper from the likes of Ebay.
Priority Start:
http://tinyurl.com/gs7w5
A similar gadget, the Battey Brain, provides remote control for anti-theft:
http://tinyurl.com/4yllun
Both can be had cheaper from the likes of Ebay.
Lol. Fwiw I use a smaller than stock battery so the PS will fit. Group 34 iirc. The thing has saved my wife's butt on several occasions but only once for me. You know how sometimes with the windows up the door doesn't fully latch if it isn't slammed hard enough and how it leaves the interior lights on? Try doing that in airport parking and coming back tired and grumpy in the middle of the night a week later. If it weren't for the PS I might have put a couple of rounds into the car right then and there 