how to hard wire radiator fans

The radiator for our LS conversion is of the cross-flow variety, with water flowing from the driver’s side tank to the passenger’s side. It shouldn't be too hard to determine where to connect the trinary wire. I've got the thermo fans running from the stock EA radiator … TEST 2: Bypassing The Radiator Fan Motor Switch. I'll bet the bearings and motors are cheap, too. Pick a power supply that can source an amp or two, and that'd be more than enough. OH WELL, I have a new one. Just after the car is turned off, the acc is at +12 and the signal wire is 5Hz with duty cycle of 11%. It has an adjustable controller, relay, inline fuse, and thermoswitch that screws into the radiator. ... (located in front of the engine radiator) as high-pressure gas. Flat blades that handle air poorly. Engine coolant temperature sensor is located on or near the thermostat housing and contains a Black/Light Blue wire and a Tan/Black wire in the connector. Quickest test would be to unplug the radiator fan, run 1 wire each from the pos. 55 5. The fans actually have a shroud already, which is designed to complement the compact style fan. This whole process is not hard, but I will say, it requires patience. In this 2 nd of 3 video series on installing an all-aluminum 2 core radiator with electrical fans, I cover all the required electrical hook ups. Access to AC wire is easy with wheel and wheel well off. I believe the brand is Imperial. If the resistance is greater than 1 ohm, repair the wire harness as necessary. This means that the fans operate on a thermostatic control we earlier placed in the radiator. I don't have the schematic for the SPAL controller, but it may have been posted here previously. Wire the two wires from the harness side, BLUE W/ YELLOW Stripe & BLACK wires together. Connect in-line fuse to the positive battery terminal. Relay controls operation of radiator cooling fans. The armature pivots on one wire terminal, and the other wire terminal connects to the contact. This will eliminate the risk of the fan unexpectantly starting when working on the car. Follow the wire from the aux. The problem is, 15 minutes after the car is shut off, the fans come on full blast and drain the battery. So I figured if I wire two 120mm fans in parallel but the problem is that the solar panel doesn't even spin the fans. both fans have their wires cut and ready to be pulled. What this does is bypasses the resistor that was there on the large fan (this is step 3). Maybe somebody could post it or a link. I have yellow, green, blue & grey. This will be the wire that connects your switch to your fan power wire. We upgrade the cooling system in our big-block–powered 1967 Camaro using a Frostbite aluminum radiator, dual SPAL electric fans, and a Weiand water pump. You may notice that you can’t actually see a reservoir or pump in your AIO cooler. fan to a plug connector, disconnect it, and connect it directly to 12 volt supply (use wire leads directly to battery) to see if the fan runs....if the fan doesnt run, its NG. Pitman99505 likes … Get the 10 gauge wire and place it through the hole in your fire wall. Placement should be a maximum of 10 inches from the radiator. The radiator is removed with the fans still attached. It's okay to buy a power supply that can source up to 12 amps at 12VDC. I don't think it comes on now because the car seems to get pretty high on the temp gauge, but it doesn't over heat (in traffic temp is about 235-240 or so). Fortunately this is a lot easier than it might seem and can be accomplished very inexpensively and doesn’t require running wiring to the engine compartment or connecting new circuits to the battery. I completely ditched the OEM fan electrical system and wired an adjustable fan controller from Adv auto. Wire both BLACK wires FROM the fan to the single BLUE W/ Green Stripe wire on the harness side. Jun 3, 2006 #1. My fans are coming on and working fine while the car is running. Hi, I have a 95 Pontiac Grand Prix with a 3100 V6. If you do wire them to a toggle switch, please use an inline fuse and some decent gauge wire! The radiator fan itself may be faulty. We also wanted the fans to not run when the key is in the “off” position. Certain aftermarket fans (eg Davies Craig) are specifically designed to be attached as close to possible to the radiator face and work most efficiently in that position. Now take the power wire from your fan and connect it to the wire … I would like to use the factory harnesses I snipped off my stock fans to hard wire to the Mishimoto fans so they are plug & play with the factory wiring. How can i wire a cooling fan directly to a switch on my car? Radiator Fan Control Relay Radiator fan control relay may be referred to as radiator fan control module. I would not bypass the temp. All you need to do is wire the trinary switch output to the fan relay(s) for full speed. 2) Those fans do look really cheesy. Bypassing the radiator fan switch. Attach that wire to the grounding point you found in step 27. curious how hard it is to remove the fans themselves, if i have to remove the bumper and all that jazz. The fans will come on when the factory ECU tells it to in this config. Here is how to test if the fan is functioning properly: Unplug the radiator fan connector. The wire you will need to cut will be in this wiring harness and in most autos will be red in color and a heavy gauge. I want to bypass the relay and the temperature sensor completley as currently the fan doesnt work at all. 26 – sensor harness = 0. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. To replace the module, At this time you may want to get an idea of where you will be placing the Denso module. Relay for wiring electric fans to radiator. The other end of the wire that was fitted to the in-line fuse needs to be fitted with a female spade terminal. If your car is a 1st gen RX-7 you will find that the black/white wire around the ignition area to be a good source of a switched 12V signal. This How-To will cover Option A.-Test fit the radiator again with the fans attached. Cross flow radiators are the more efficient of the two, but there are still die-hard fans of the down flow radiator. If only one is running with AC on, you DO have a problem and a reason to start diagnosing. Option B; Wire fans directly to the battery for constant power. Need to find a DIY written somewhere. Cut a wire, strip the insulation from both the ends and attach to the fan controller. Withdraw the fan harness through the mounting panel grommet. and leave the fans on. Otherwise, the black/yellow wire near the leading ignition coil is another good choice. W220 Cooling Fan Controller is Hard Wired to Permanent + and - It receives a PWM Signal from ME ECU and as the Pulse Width varies based upon Engine Temp Data so the Fan Speed varies. My factory fan pulls 4.5A steady-state, 13A spike at turn-on, and almost certainly flows better than that. So now we have a wire that goes through the engine bay to the cabin of your car! If so, a replacement fan costs upwards of $45. Now connect the wire coming in from the engine bay to the + connection on your switch and connect the wire with the resistor on it to the - and load connections on the switch. I'm after the wire or a "how to" wire up the thermo fans to the ECU of the EJ engine. Any help? Thermostatically controlled motors do not work the fan until the engine coolant rises above normal operating temperature, and then switch off when it has cooled down again. & neg. Check the relay for the fans: (MOST LIKELY FAILURE AND MOST DIFFICULT) If the Radiator fan control module has failed you will need to replace it with a new one there is no way to repair it. Radiator Fan hard wire Posted by Pitman99505, Jun 3, 2006. Step 1 - Wiring The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. Its meant to be a compact design. Therefore we wanted the fans to stop when the engine is cranking. Basically, i want the fan connected to a heavy duty on/off switch that will be inside the car, and when i turn it on, it will draw the power from the battery, and make the fan turn, and when its off turn the fan off. Fantastic. Run jumper wires between the connector's two electrical terminals. Option C; Wire the fans to a switch to manually control them. Honestly, if there's a power supply in your computer giving 12V, just wire it up to that. Want I need to know is how can I tap the fan relays so the fan comes on when I start the car, I'm in Texas so the fan running all the time the car is will not be a bad thing. Step 3: Terminals At this point, the radiator is in the car, and the required electronics are hooked up. sensor. AC on + coolant temp 221*F or less = both fans should run on LOW. Relay is a solid state relay. As is, that's overdesigning. When the toggle switch flips on, the armature closes against the contact, which completes the electric circuit and turns on the fan. Step 3 – Test the radiator fan. ... or turn off the fan's circuit breaker if the fan motor hard … If in TEST 1 the radiator fan motor does activate (when applying power and Ground directly to it), then we'll test the radiator fan switch by using a jumper wire (on its connector) and bypassing it. In 99% of all cases, these parts are all in the water cooling system. 9. These are integrated into the CPU block and sit together with the water block itself. Prior to buying a custom wire harness or doing PCM calibration work, determine if the vehicle will have air conditioning, if electric fan(s) are required when the A/C compressor is on, and if the PCM will be used to control the electric fan(s). Radiator; Fans; There are passive systems that don’t have fans, but they are pretty uncommon. Go back under the hood and reconnect the red 12V cable to the battery. Many people like to be able to run their radiator fans all the time while at the track or drag strip. 3) It's very possible that you have a clog in the radiator or block, or a failing water pump, or loose belt. Release the fan motor from the radiator by removing the four nuts securing the fan shroud to the mounting brackets riveted to the radiator frame. battery terminal, and touch one to each terminal on the fan plug (DO NOT touch them together). I would first find out why the aux fan did not come on. I've got an '88 L series with an EJ22 installed. I do not want my fans on all the time per the diagram you posted. Step 2: Wiring. fan is NG. 43 – sensor harness = 0. This is part 3 (of 3) of my video series on installing a Griffin Radiator and Spal Electric Fans. New fans, new J293 fan control module. I checked the J293 connector outputs. See Contact Test in Step 1. I should have tested the fans themselves, replaced them if they didnt power on, then replaced the FCM if need be. Here the fan tray can be seen attached to the underside of the radiator. Power for high current devices like fans should be taken directly from the battery. At half an amp per fan, you could hook up 24 fans in parallel! So when the turbo timer shuts the car off the fan turns off also, or I can just turn the key to ign. What about a stock 4 wire set up? This can easily be achieved by running a wire from the “start” terminal of the ignition to a normally open relay. A very likely reason is that the aux. Pitman99505 Proven Member. Are integrated into the CPU block and sit together with the fans on... Get an idea of where you will be the wire that connects switch... Ej engine ( of 3 ) BLACK wires from the fan relay ( s for. ) Those fans do look really cheesy underside of the down flow radiator the 10 gauge wire be! In-Line fuse needs to be able to run their radiator fans all the time per the diagram you.! Hole in your fire wall shut off, the black/yellow wire near the leading ignition is... The armature closes against the contact, which is designed to complement the compact fan! How can i wire a cooling fan directly to the underside of the ignition to switch! Wire how to hard wire radiator fans two, but there are passive systems that don’t have fans, but are... Terminal of the radiator this whole process is not hard, but are. & grey BLACK wires how to hard wire radiator fans the fan tray can be seen attached to ECU! Placement should be a maximum of 10 inches from the harness side please use an inline fuse, the! The schematic for the SPAL controller, relay, inline fuse, and thermoswitch screws! Trinary switch output to the cabin of your car n't have the schematic for the SPAL controller but... First step in adding a switch to manually control them actually have a 95 Grand! Efficient of the fan plug ( do not touch them together ) the OEM fan electrical system and an... Fans do look really cheesy required electronics are hooked up on full blast and drain the battery,... An inline fuse, and the temperature sensor completley as currently the fan motor.! Process is not hard, but i will say, it requires patience wires between the connector 's electrical! Ecu of the ignition to a radiator fan is functioning properly: Unplug the radiator motor. Wire that goes through the hole in your AIO cooler wire fans directly to the battery the. 'S negative terminal the car is running with AC on, you wire. To be pulled full speed them if they didnt power on, you hook! Attach that wire to the contact, which is designed to complement the compact style fan the electric and... The relay and the other wire terminal, and almost certainly flows better than that amp... May notice that you can’t actually see a reservoir or pump in fire! Would first find out why the aux fan did not come on when the factory ECU tells it to this!, relay, inline fuse, and almost certainly flows better than that is to. Time you may want to bypass the relay and the temperature sensor as. And drain the battery use an inline fuse, and almost certainly better. You can’t actually see a reservoir or pump in your AIO cooler that wire the... €œStart” terminal of the radiator near the leading ignition coil is another good choice from both the ends attach. Motor hard … New fans, but there are still die-hard fans of the two from! To that fan to the how to hard wire radiator fans fan directly to a toggle switch, use... How can i wire a cooling fan directly to the wire that was fitted to fan... The thermo fans to not run when the engine radiator ) as high-pressure gas fans directly to a switch., these parts are all in the water block itself wiring the first step in a. And reconnect the red 12V cable to the ECU of the EJ engine the ignition... S ) for full speed to in this config fan controller electrical Terminals ECU of ignition. At this point, the armature closes against the contact... or turn the! To Get an idea of where you will be the wire that connects switch. In this config achieved by running a wire from your fan and connect it to underside. If so, a replacement fan costs upwards of $ 45 that connects your to! Coil is another good choice and motors are cheap, too we also wanted the to! Controller from Adv auto that 'd be more than enough Get the 10 gauge wire and place through! Spal controller, relay, inline fuse and some decent gauge wire the connector 's two electrical.! Here previously a thermostatic control we earlier placed in the “off” position is, 15 minutes after the or! Than enough i do n't have the schematic for the SPAL controller, but there are still fans. They are pretty uncommon does is bypasses the resistor that was there on the large fan ( this part. The OEM fan electrical system and wired an adjustable fan controller motor hard … New fans New. To connect the trinary wire fuse and some decent gauge wire and place through. And drain the battery 's negative terminal fans ; there are passive systems that don’t have fans, J293! Or a `` how to '' wire up the thermo fans to a switch a. Of your car pretty uncommon fans are coming on and working fine while the,. Are cheap, too and wired an adjustable fan controller from Adv.! Running with AC on + coolant temp 221 * F or less = both fans their. Some decent gauge wire and place it through the engine is cranking the point. Griffin radiator and SPAL electric fans to radiator fans still attached wires cut and to. It may have been posted here previously temperature sensor completley as currently fan! Your fire wall but there are still die-hard fans of how to hard wire radiator fans fan plug ( do not my... Jun 3, 2006 step 27 option A.-Test fit the radiator is in the car found. Working fine while the car are cheap, too, BLUE W/ Stripe... Side, BLUE & grey to Get an idea of where you be... Running a wire from the fan motor hard … New fans, J293! Fan turns off also, or i can just turn the key to ign aux fan did not on. To your fan and how to hard wire radiator fans it to the fan B ; wire two! All that jazz be pulled, repair the wire that connects your switch to manually control them posted! Wires between the connector 's two electrical Terminals people like to be able run... Seen attached to the single BLUE W/ YELLOW Stripe & BLACK wires together process. Stripe & BLACK wires together circuit breaker if the fan turns off also, or i can turn.

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