Now that I have my AFR headed 331, it overheats in traffic. The fan shroud is very important. (Do not install fuse at this time) 2. Your radiator fan motor has a cable connecting to another cable that sends a signal from the PCM. Simply wedge the switch in the radiator fins. I know it runs about the same amount of time before shutting off as the stock KTM Hardparts fan was running, and it does it with only an 8w draw which is less than 1/4 of what the KTM fan draws. In order to run a solar fan directly from solar panel without battery you need to select whole system carefully. 5. My brother in law's 1984 corvette has the hot wire to the radiator fan connected directly to the battery with an - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. If, temporarily, you don't refit the grommet where the wire comes through you will be able to see the wire and hole directly behind the instrument pod. Won't respond quite as quickly as a switch thats directly in contact with the water flow, but it functions just fine 6. I see that this Vanagon's low speed fan appears to run directly through the fuse box to the fan (but it doesn't work) and the high speed fan appears to use a relay. With a relay, current is supplied to the fan directly from the battery, which ensures that the fan receives the full system current it requires to work at its design speed. wire and run a jumper wire directly to the positive (+) terminal on the battery. Should the radiator fan come on when the car starts? It would be good to put a dc controller in between panel and dc fan. b4 wiring to fuse box or ignition i tested and today it melted positive side of switch, like the other fan did.. som are my fans on way out or should i put a resistor in i hooked it up to a switch to battery.. the terminals get hot, and did spark when joined. Now look in the cable there should be a ground and a positive wire. Warning: installation of accessories should only be undertaken by Direct Connection of the Radiator Fan In PAKISTAN most of the cars have this problem that their radiator fan starts directly when the car is started regardless of the water temperature in the radiator, because the fan (electrically driven) circuit is by passed from the thermostat switch. While most manufacturers mount the cooling fan resistor directly to the cooling fan assembly, not all do. Connect the “B” terminal on the control to the 12 volt positive (+) battery terminal using the thick red wire and fuse holder provided in the kit. Use a blade terminal for the relay and a barrel connector for the fan. the electric fan should start immediately. A deeply drained battery will soon sulphate and die too. A 16-inch round fan covers only 201 square inches, which is only half of the total surface face of the radiator. It can also be mounted to the front side of the radiator assembly, the radiator core support, a bracket on the inner fender, or any other place that will get a lot of air flow. With the stock motor, it cooled fine. I wired my radiator fan directly to my battery on a suggestion from a reputable VW aircooled and diesel mechanic my dad takes his cars to. This will be the wire that connects your switch to your fan power wire. the other i cut off as i had radiator probs. 01-13-12 54988 Page 3 of 4 1. What causes the radiator fan to come on? So, I have the POS Black Magic fan. : at 6 o’clock), to Unhook those cables. The first 50cfm cpu fan I tried ran quite a bit more than the KTM fan. Without it, the fan will only pull air through the area directly in front of it's blades, as well as the side between the blades of the fan and the radiator. could you help me? Wiring the Fan: Radiator and Fan Combo #51168 & #51169 only Rev. 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. How can i wire a cooling fan directly to a switch on my car? For 8”, 9”, 10” and 12” fans, check that the wires exit the motor downwards (i.e. With the help of a wire cutter, cut the wire at a distance of twelve inches from the start point. The temperature of the engine is the main factor to trigger the radiator fan. Attaching this wire directly to a 12V non-switched source will allow the fan to run after the vehicle has been turned off which could effect the vehicles battery performance. if the fan started reattach the green wire to the proper (+) wire on the a/C clutch or manual switch. I want to bypass the relay and the temperature sensor completley as currently the fan doesnt work at all. Take care that the fan and shroud does not foul any struts, engine pulleys, bonnet latches etc., including when the bonnet is closed. Now take the power wire from your fan and connect it to the wire … If the fan is affixed directly to the core’s face, this will only pull air across half of the radiator in low-speed driving when you need maximum cooling. simply buy a on off switch 30 amp or better automotive run this switch directly from the battery directly to the hot wire on the fan motor, FYI In some instances this will cause over run or Idling on after the ignition switch is turned off the fans produce enough back power to barely keep the engine running if this happens just take it alll ! Attach the wire to the relay terminal opposite the battery terminal. I want to bypass the relay and the temperature sensor completley as currently the fan doesnt work at all. In a few cases, this circuit controls the fan directly, but more commonly, the circuit energizes a relay. Cut another piece of the 10-gauge wire long enough to go to the fan. 2. Connect the positive tail from the led to this signal wire from the rad fan relay. It flows 90 cfm which cannot be too far off of what the stock fan flows. Run 1 wire direct from battery (or keyed ignition power) into 1 side of the bi-metal switch, other wire direct to the fan. Attaching this wire directly to a 12V non-switched source will allow the fan to run after the vehicle has been turned off which could effect the vehicles battery performance. Yes, you can power the fan from the battery momentarily to see if the fan works, however powering it continuously from the battery is a bad idea. While most manufacturers mount the cooling fan resistor directly to the cooling fan assembly, not all do. 30 (other red wire) needs constant 12-volt power from the battery. First, you need to unplug the wiring connector. It's job is to force the fan to pull air through the entire radiator. 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