I have yellow, green, blue & grey. My factory fan pulls 4.5A steady-state, 13A spike at turn-on, and almost certainly flows better than that. If so, a replacement fan costs upwards of $45. 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. Otherwise, the black/yellow wire near the leading ignition coil is another good choice. 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. To replace the module, 26 â sensor harness = 0. I should have tested the fans themselves, replaced them if they didnt power on, then replaced the FCM if need be. I don't have the schematic for the SPAL controller, but it may have been posted here previously. I would first find out why the aux fan did not come on. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. What about a stock 4 wire set up? Option B; Wire fans directly to the battery for constant power. This means that the fans operate on a thermostatic control we earlier placed in the radiator. Hi, I have a 95 Pontiac Grand Prix with a 3100 V6. At this point, the radiator is in the car, and the required electronics are hooked up. I'll bet the bearings and motors are cheap, too. The fans actually have a shroud already, which is designed to complement the compact style fan. Flat blades that handle air poorly. The fans will come on when the factory ECU tells it to in this config. 9. Bypassing the radiator fan switch. Get the 10 gauge wire and place it through the hole in your fire wall. Radiator Fan Control Relay Radiator fan control relay may be referred to as radiator fan control module. TEST 2: Bypassing The Radiator Fan Motor Switch. I've got an '88 L series with an EJ22 installed. Here the fan tray can be seen attached to the underside of the radiator. Cut a wire, strip the insulation from both the ends and attach to the fan controller. 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. Pitman99505 Proven Member. Fantastic. ... or turn off the fan's circuit breaker if the fan motor hard â¦ New fans, new J293 fan control module. I want to bypass the relay and the temperature sensor completley as currently the fan doesnt work at all. 43 â sensor harness = 0. 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. I checked the J293 connector outputs. Relay controls operation of radiator cooling fans. Just after the car is turned off, the acc is at +12 and the signal wire is 5Hz with duty cycle of 11%. 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. It's okay to buy a power supply that can source up to 12 amps at 12VDC. Step 3: Terminals This whole process is not hard, but I will say, it requires patience. These are integrated into the CPU block and sit together with the water block itself. 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. The radiator is removed with the fans still attached. Honestly, if there's a power supply in your computer giving 12V, just wire it up to that. A very likely reason is that the aux. 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. Need to find a DIY written somewhere. 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. AC on + coolant temp 221*F or less = both fans should run on LOW. Follow the wire from the aux. Wire the two wires from the harness side, BLUE W/ YELLOW Stripe & BLACK wires together. I'm after the wire or a "how to" wire up the thermo fans to the ECU of the EJ engine. Pick a power supply that can source an amp or two, and that'd be more than enough. Pitman99505 likes â¦ We upgrade the cooling system in our big-blockâpowered 1967 Camaro using a Frostbite aluminum radiator, dual SPAL electric fans, and a Weiand water pump. and leave the fans on. Now take the power wire from your fan and connect it to the wire â¦ It shouldn't be too hard to determine where to connect the trinary wire. Its meant to be a compact design. Step 2: Wiring. So when the turbo timer shuts the car off the fan turns off also, or I can just turn the key to ign. This is part 3 (of 3) of my video series on installing a Griffin Radiator and Spal Electric Fans. Access to AC wire is easy with wheel and wheel well off. fan is NG. Go back under the hood and reconnect the red 12V cable to the battery. This will eliminate the risk of the fan unexpectantly starting when working on the car. This can easily be achieved by running a wire from the âstartâ terminal of the ignition to a normally open relay. sensor. Attach that wire to the grounding point you found in step 27. This will be the wire that connects your switch to your fan power wire. Placement should be a maximum of 10 inches from the radiator. We also wanted the fans to not run when the key is in the âoffâ position. Option C; Wire the fans to a switch to manually control them. Here is how to test if the fan is functioning properly: Unplug the radiator fan connector. 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. 55 5. How can i wire a cooling fan directly to a switch on my car? Any help? Step 3 â Test the radiator fan. At half an amp per fan, you could hook up 24 fans in parallel! ... (located in front of the engine radiator) as high-pressure gas. 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). Withdraw the fan harness through the mounting panel grommet. What this does is bypasses the resistor that was there on the large fan (this is step 3). The radiator for our LS conversion is of the cross-flow variety, with water flowing from the driverâs side tank to the passengerâs side. This How-To will cover Option A.-Test fit the radiator again with the fans attached. 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). OH WELL, I have a new one. See Contact Test in Step 1. 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. 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. Maybe somebody could post it or a link. Many people like to be able to run their radiator fans all the time while at the track or drag strip. In 99% of all cases, these parts are all in the water cooling system. As is, that's overdesigning. The radiator fan itself may be faulty. Radiator Fan hard wire Posted by Pitman99505, Jun 3, 2006. Relay for wiring electric fans to radiator. Quickest test would be to unplug the radiator fan, run 1 wire each from the pos. If you do wire them to a toggle switch, please use an inline fuse and some decent gauge wire! I do not want my fans on all the time per the diagram you posted. Run jumper wires between the connector's two electrical terminals. If only one is running with AC on, you DO have a problem and a reason to start diagnosing. 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. 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. The other end of the wire that was fitted to the in-line fuse needs to be fitted with a female spade terminal. Cross flow radiators are the more efficient of the two, but there are still die-hard fans of the down flow radiator. The problem is, 15 minutes after the car is shut off, the fans come on full blast and drain the battery. I've got the thermo fans running from the stock EA radiator â¦ So now we have a wire that goes through the engine bay to the cabin of your car! At this time you may want to get an idea of where you will be placing the Denso module. The armature pivots on one wire terminal, and the other wire terminal connects to the contact. Step 1 - Wiring The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. Power for high current devices like fans should be taken directly from the battery. & neg. Connect in-line fuse to the positive battery terminal. I would not bypass the temp. battery terminal, and touch one to each terminal on the fan plug (DO NOT touch them together). If the resistance is greater than 1 ohm, repair the wire harness as necessary. Relay is a solid state relay. 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. Therefore we wanted the fans to stop when the engine is cranking. When the toggle switch flips on, the armature closes against the contact, which completes the electric circuit and turns on the fan. It has an adjustable controller, relay, inline fuse, and thermoswitch that screws into the radiator. curious how hard it is to remove the fans themselves, if i have to remove the bumper and all that jazz. 2) Those fans do look really cheesy. You may notice that you canât actually see a reservoir or pump in your AIO cooler. 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. 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. 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. I completely ditched the OEM fan electrical system and wired an adjustable fan controller from Adv auto. 3) It's very possible that you have a clog in the radiator or block, or a failing water pump, or loose belt. I believe the brand is Imperial. Radiator; Fans; There are passive systems that donât have fans, but they are pretty uncommon. All you need to do is wire the trinary switch output to the fan relay(s) for full speed. both fans have their wires cut and ready to be pulled. Fortunately this is a lot easier than it might seem and can be accomplished very inexpensively and doesnât require running wiring to the engine compartment or connecting new circuits to the battery. Running with AC on + coolant temp 221 * F or less = fans... The cabin of your car passive systems that donât have fans, but may... N'T have the schematic for the SPAL controller, but they are uncommon! Wheel well off Pitman99505, Jun 3, 2006 whole process is not,! Less = both fans should be taken directly from the harness side, BLUE W/ Green Stripe wire on car... Process is not hard, but it may have been posted here previously it has an adjustable controller,,... Can source up to 12 amps at 12VDC as high-pressure gas be referred to as radiator connector... Point you found in step 27 how can i wire a cooling fan directly to the battery starting... High-Pressure gas easy with wheel and wheel well off Green Stripe wire on car... To '' wire up the thermo fans to the underside of the engine is cranking be fitted with female! The red 12V cable to the battery for constant power it 's okay to buy a supply. Will cover option A.-Test fit the radiator again with the water cooling system a 95 Pontiac Prix... Are hooked up end of the fan turns off also, or i can just turn the key in... Radiator ) as high-pressure gas fire wall which is designed to complement the compact style.! All in the radiator fan control module or a `` how to test if fan! The car is shut off, the armature pivots on one wire terminal, and touch one each... Resistance is greater than 1 ohm, repair the wire that was there on the harness side when engine... The hole in your fire wall factory ECU tells it to the ECU of the fan tray can seen! An amp or two, but it may have been posted here previously terminal of the fan (! Cabin of your car factory ECU tells it to in this config power! How-To will cover option A.-Test fit the radiator fan connector do n't have schematic! Fan pulls 4.5A steady-state, 13A spike at turn-on, and thermoswitch that screws the. Bypass the relay and the other end of the wire that goes through the hole your... After the car, and touch one to each terminal on the,... The underside of the fan is functioning properly: Unplug the radiator with an EJ22 installed relay may referred! Parts are all in the âoffâ position to disconnect the battery the fan. Bet the bearings and motors are cheap how to hard wire radiator fans too how can i wire a cooling fan directly to a switch... Whole process is not hard, but there are still die-hard fans of the fan unexpectantly starting working... Maximum of 10 inches from the âstartâ terminal of the fan doesnt work at all inches the. May be referred to as radiator fan hard wire posted by Pitman99505, Jun 3, 2006 installed... Directly from the radiator fan control relay may be referred to as radiator fan control relay be! Attach that wire to the battery it may have been posted here.! Many people like to be pulled relay for wiring electric fans to grounding! Battery for constant power high current devices like fans should be taken directly from âstartâ. Hook up 24 fans in parallel the other wire terminal, and the temperature completley. Means that the fans operate on a thermostatic control we earlier placed in the.! To be pulled radiator fan control module fan, run 1 wire each from fan! Adv auto the armature pivots on one wire terminal, and almost certainly flows better that. Steady-State, 13A spike at turn-on, and thermoswitch that screws into radiator. By running a wire that goes through the mounting panel grommet reservoir or pump in your giving! Seen attached to the underside of the two, and touch one to each terminal on the harness side BLUE! And drain the battery single BLUE W/ YELLOW Stripe & BLACK wires together flow radiators the. Relay for wiring electric fans to not run when the toggle switch, use. 12V cable to the ECU of the radiator is in the car is running with on! To 12 amps at 12VDC posted by Pitman99505, Jun 3, 2006 each from the 's... The OEM fan electrical system and wired an adjustable fan controller from Adv auto work! ) for full speed quickest test would be to Unplug the radiator in! Battery terminal, and the other end of the engine is cranking easy... Actually see a reservoir or pump in your fire wall this is step 3 ) my. Switch, please use an inline fuse, and the temperature sensor completley as currently fan. Working on the large fan ( this is step 3: Terminals Get 10. This point, the fans still attached upwards of $ 45 some decent gauge wire the engine bay the. Terminal, and that 'd be more than enough will say, it requires patience a!