secondary fan
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Joined: Mar 2010
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From: norco ca
secondary fan
has anyone installed a switch to turn the secondary fan on too cool the engine down?
mine doesnt turn on till its way to hot. therefore i cant take it into traffic.
gauge goes almost all the way to the very end then fan turns on.
mine doesnt turn on till its way to hot. therefore i cant take it into traffic.
gauge goes almost all the way to the very end then fan turns on.
Le Mans Master
Joined: Aug 2000
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From: Australia
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
How hot do you run?
I would also check over your cooling system. Check for debris between the radiator and the A/C condenser. Is the thermostat OK, what does it normally run at. Have you flushed the radiator and refilled it every year or two.
This is for my 94
I would say that I do not have a temp problems and run around 193-200 normally in Orlando where it is hot in summer. I never approach the 238* mark where the secondary fan kicks in normally. I have installed a aux fan switch to turn on the secondary fan when I wanted to. Like when getting stuck in traffic and exit ramps during rush hour. Sometimes at about 210*, I kick it on which prevents it from climbing and does take the temp down.
Hears how I did it for basicaly no money spent.
Connect one wire from the switch to the dark blue wire #473. No need to cut wire, just skin back insulation and wrap around. This wire has 12 volts on it and is the return or low side of the relay coil. The other terminal of the relay coil has the 12 volts supplied from the fuse. The other wire from the switch goes to ground.
When the switch is closed, the coil of the relay will be energized and close the relay contacts starting the fan. This is the same process that the PCM does by grounding the #473 wire.
I elected to run the ground lead to a convenient point under the hood near the fan relay. I ran my wires into the car and hid it under the speaker enclosure to under the seat where all I have to do is to reach down and flip the switch on or off. Works great, been doing it for years.
Any kind of switch will work and I used an encapsulated wire, 2 wires in one cable.
I would also check over your cooling system. Check for debris between the radiator and the A/C condenser. Is the thermostat OK, what does it normally run at. Have you flushed the radiator and refilled it every year or two.
This is for my 94
I would say that I do not have a temp problems and run around 193-200 normally in Orlando where it is hot in summer. I never approach the 238* mark where the secondary fan kicks in normally. I have installed a aux fan switch to turn on the secondary fan when I wanted to. Like when getting stuck in traffic and exit ramps during rush hour. Sometimes at about 210*, I kick it on which prevents it from climbing and does take the temp down.
Hears how I did it for basicaly no money spent.
Connect one wire from the switch to the dark blue wire #473. No need to cut wire, just skin back insulation and wrap around. This wire has 12 volts on it and is the return or low side of the relay coil. The other terminal of the relay coil has the 12 volts supplied from the fuse. The other wire from the switch goes to ground.
When the switch is closed, the coil of the relay will be energized and close the relay contacts starting the fan. This is the same process that the PCM does by grounding the #473 wire.
I elected to run the ground lead to a convenient point under the hood near the fan relay. I ran my wires into the car and hid it under the speaker enclosure to under the seat where all I have to do is to reach down and flip the switch on or off. Works great, been doing it for years.
Any kind of switch will work and I used an encapsulated wire, 2 wires in one cable.
