Wiring color code or symbols, wiring harness, radio and audio wiring, circuit diagram, light switch wiring diagram. Lucky for me I got some help from some folks on line. It refused to work and I blew at least 6 fuses before I got it right. If both of the wires you unplugged the blower motor from are hot, plug one of them into the motor and run a new wire from the other wire on the blower motor into the car and plug that into the single connector on the resistor. This is yellow wire 913 that travels from the female connector at the resistor under the dash to the firewall main disconnect.
That would lead me to conclude the problem is between the firewall and the resistor connection - under the dash! This is a system that can be a little confusing until one realizes that it is wired backwards from the way most of the stuff in this car is wired. The care and feeding of ponies mustang heater blower motor 1965 and here is how the heater blower motor works on the 6566 mustangs if you click on the diagrams they will pop out so that you can see the entire diagram. The wires between the resistor pack and the switch may be any color. Hooked the brown wire to the positive battery terminal, the yellow to the negative, I heard the fan spin- so, the fan blower is operational. If the blower motor that you have sticking through the firewall has two wires coming out of it,unplug them both, turn the ignition key on, and check the two wires that you just unplugged the blower motor from, the two that are part of the wiring of the car, for power with a volt meter. This is yellow wire 913 that travels from the female connector at the resistor under the dash to the firewall main disconnect. Wiring color code or symbols, wiring harness, radio and audio wiring, circuit diagram, light switch wiring diagram.
So let me paint you a picture. Any ideas or anyone had a similar issue? I have a attached a large picture of the wiring schematic. However, previous owner decided to repair heater, and so I have 3 speed heater, 3 speed switch, and no place to plug in the resistor wires. If it does not play please check out our channel for the latest, and of course, subscribe and live the adventure with MustangMedic. They don't want to re-engineer the entire car, they just want someone to fix what broke. These are the colors of the two wires that connect at the blower motor itself.
Old air products blower motor resistor 4prong wac fits 196872 blower motor resistor 4prong wac tap to enlarge. If your confused now, this should help. This way you eliminate it from your troubleshooting tree. The heater blower motor has power coming from the component to the switch. So that tells me to disregard everything downstream of this i.
The resistor is an integral part of the switch. Customer Testimonial video playlist: MustangMedic Ford Mustang Search Rescue. Have done the following: Hook the 2 wires coming out of the fan and connect them to the battery. The wiring supports the 3-speed setup. Take the wire, should be yellow, off of the resister on the heater box and ground it. Most everything related to the '65-'68 Mustang heater assembly is reproduced these days—even the heater box itself—save for a few minor parts when you get into the '67-'68 model years.
One of these should have your heater up and running. If you have any questions that you think I might be able to help you with, or, if I have posted something that still doesn't seem to be as clear as it could be, please feel free to ask. Wiring harness diagram on 1966 mustang air conditioning gauge wiring 1969 mustang heater control wiring diagram 16 17 sg dbd de u2022 rh 16 17 sg. Replace it with this new 3-Speed Heater Blower Motor Switch, which will simply control the flow of heat into your Mustang. Power comes from the fuse box and goes straight to the blower motor on the brown wire. I spent many hours tracking this down, because the connection looked fine when measuring with a multimeter, but when putting the circuit under some real load the heater fan , it became apparent that the selector switch grounding was indeed a high impedance ground that would fail when a moderate amount of current was attempting to flow thought the circuit. This video series is truly a learning experience for everyone involved! In any of the speeds the power is then grounded causing the motor to turn.
The brown wire supplies 12v t other blower motor, the yellow is the ground and it connects to the resistor inside the car. This will take the dash switch out of the picture. Just good, solid advice from people that know what they are talking about. Slide the bezel out and disconnect the speedometer cable. I made them as big as I could so that they would be easier to see. It does not have the resistor on the heater box. Most systems have power coming from the switch to the component.
I'm not sure how to fix the issue if that part checks out ok. Has the heater blower motor switch in your late 1965-1966 Mustang been malfunctioning or not working altogether? If it's 40 degrees outside, just keeping the windows up and the cowl vents closed isn't going to warm the interior. . There will be a three pin connector and a yellow single wire attached to it. Only touch one prong at a time. Once you start driving, the cold air hitting the windshield is going to create visibility issues that a functioning defrost system can remedy versus a quick swipe with a towel at the red light—you know who you are. Wiring harness diagram on 1966 mustang air conditioning gauge wiring 1967 gto heater wiring diagram 1 1 pluspatrunoua de u2022 rh 1 1 pluspatrunoua de.
Power comes from the fuse box to the switch, and, goes from the switch to the blower motor. It is important that the switch be making good contact with the unpainted metal of the dash on the back side, or, the system won't work, so, if you decide to paint your dash, make sure that the switch housing is still making good contact when you reinstall it. If that works reconnect them. User Alert System provided by - Copyright © 2019 DragonByte Technologies Ltd. They take their car to some technician when what they actually need is a mechanic, and this, frequently, does not work out very well at all for the owner. Earlier Mustangs used a 2-speed switch. If the resistor pack is okay, and you've made sure that the fuse is okay, then it could be the grounding at the speed selector switch itself.
Your email address will not be published. We course correct in the following video if need be. General heater system issues include a leaking heater core, inoperative blower motor, and deteriorated internal seals that allow air leakage and reduce the system's effectiveness. It leaves the blower motor through the yellow wire, which plugs into the resistor on the front of the heater box. Did you check to connections under the hood, you should find a brown wire and a yellow wire. From there it connects to the Engine feed gauge harness under the hood to the blower motor.