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