Fan wiring PLEASE HELP

hi , i have a 1988 ford escort with the 1.9 engine . There are 2 fans on this car . One in front of the radiator and the other is in the back of it . I think the previous owner install the fan in front of the radiator because the wiring doesnt look factory done. Anyway when i drive the car and and I turn it off the fan in front of the radiator stays on till it cools the coolant down . Sometime that might be a good 15 minutes . I have no problem with that execpt it seems to drain down the battery . Is any one knowledgeable to help me rewire the fan relay to the fan so that when i turn off the ignition switch. The fan does not stay on

If it were me, I'd do more investigating as to why it thinks it needs to stay on so long after turning off the engine. That does seem excessive even without considering the excessive battery drain that is occurring. If your battery is four or more years old, the battery maybe should be your first priority. Has the cooling fan always needed the same long time to cool down on hot days or has it gotten worse? If no different, then it has survived just fine until this point with a stronger battery. If it is taking more time to cool down, I'd be leary of having it run only when the ignition switch power is on, as you may loose an engine instead of a battery. Maybe the thermocouple or temp sensor isn't right. Maybe it has moved. Maybe your radiator is plugging up inside. Maybe the fan blades are so filthy they can't move as much air. Are the radiator fins plugged, need cleaning?

To bypass everything so that the fan comes on only when the ignition switch is on would require connecting to a circuit that does the same. Check for when you have power so you tap into a circuit that turns on and off with the ignition switch. You will want to splice in at the fuse box to bypass all of the relays for the old fan. I only have a more recent year wiring diagram, but it interestingly indicates that you could splice into the fuse circuit called "engine" which also happens to supply the power to the fan. Wish we knew why the old fan isn't hooked up. Could just substitute the new one into the old wiring. Does the replacement fan blow air into the radiator or suck it from the engine side out through the radiator and out to the grill? If the second, than that's backwards using hotter engine air to cool the radiator. Only special circumstances do you want to do that.

Thank you DADDYtripplet, the old fan is hooked up . both fan comes on just the one in front of the radiator stay on when the car is turn off. Any way I will look deeper into what you suggest, by finding out why the car gets that hot. I will keep you all posted.

That seems odd to need two fans. Wonder what the guy was thinking. I didn't catch how the add on fan was supplied power. It may exceed the fuse for the original fan circuit, but to have the second fan turn on and off with the other fan, just tap into the original fan wiring. I'd be curious to know what regulates the front fan. How does it know it's cool enough and hot enough? The original fan has an engine coolant temperature sensor screwed into the thermostat housing or the heater core hose manifold or intake manifold, all in the same area, depending on engine. It is two wired, but it probably can't be spliced into as it is sending a signal to the computer which in turn supplies power to the fan.

Oh, btw, does the front fan stay on the same amount of time every time you turn off the car? If so, then it may run off a timer rather than a thermostat. If so, maybe the timer is adjustable. Does the original fan turn on after you turn off the car? Maybe if it didn't, that's why the second was added.

The second fan turns on when you turn on the air conditioning. Normally they have a relay for each fan. You should also check fuses.
If you hold your finger on the relay you can feel them click. You can also check for voltage at the fan motor. If you have voltage hook your test light to the hot terminal then make sure you have a ground. If you have no ground buy a wiring diagram and check for an open or possible bad computer.
You can also have corrision in the fuse or relay area.

I thought I update everyone on what I have done to fix the problem with the advice from here . I brought a new battery because the the old one was 5 yrs old and had a dead cell . I checked the coolant level in the radiator and is was very low and overflow reservoir was bone dry. It took half of a gallon of water and I added a dye to located any leak that might be present in the cooling system. After 2 days of driving , I was able to find a leak at the bottom of the radiator from the drain plug. I replaced it with a new one and drove the car another 2 days and it seems to be have no more leak. As for the Fan it comes on and turns off in 1 min give or take a few seconds (which is normal since I brought the car). The car does have A/C but does not blow cold neither do i care for it to work . The fan in front of the radiator is connected to the engine coolant temperature sensor just like the fan behind the radiator. As things stand it works like it used to and i am happy . And once again i would like to thank everyone for the help on here and if anyone have anything constructive to add please do so .

If it is aftermarket I'd take it off and not use it. There is probably no reason to have it.