2013 Vista Dashboard a/c heater blower inop

[swish]

I have a 2013 Vista on a f53 chassi. The ac/heater blower motor dont work coming out of the dash. The blower motor has good battery power. I tried another blower motor it still dont work. Any one had this problem before. Thanks for any info

[powercat_ras]

This might help ...

Not sure you measured right across the blower wires, the 20 amp ignition switch based feed goes to the vac mode switch and then to the blower switch then finally thru the resistor before reaching the blower.

[powercat_ras]

This might help ...

Not sure you measured right across the blower wires, the 20 amp ignition switch based feed goes to the vac mode switch and then to the blower switch then finally thru the resistor before reaching the blower.

The 2nd red wire coming up from the bottom part of the drawing that is cut off is the 20 amp ignition switched power feed wire.

Note that Ford does not need or use an electric condenser fan on the F53 chassis, but that has nothing to do with the blower problem, anyway.

[Morich]

To cut the chase a bunch, it is sometimes good to skip to the things that fail often.
In this case the resister pack is that suspect.
It is designed to have power come to it on various wires and then go through the resister pack taking different routes to give more or less resistance depending on the switch setting for if you want slow, medium, or high.
One way to cut the chase is to verify that power is coming from the speed selector switch and actually gets to the resisters.
If no power is getting to the resister, then you have to go back left on this drawing to find where it is failing.
But if 12Volts is getting to one of the lines going through the pack but not coming out, the pack is bad.
This pack is one of those simple things which has not been "upgraded" to the point we can't see what it does, so we can often just look at the connections and follow the path though the various coils of wire (springs?) that make the resistance and see where one is broken!
The third thing to check is if the power gets to the pack, through it but doesn't get to the motor. That red wire out of the pack to the motor may just be broken but the pack is a good suspect!


Often found screwed directly on the housing of the blower where air passes over it.

[Morich]

Sorry, just reread your post and woke up to chasing the totally wrong cause. If power is getting to the motor, there is no reason to chase the circuit to get power to the motor!!

Either the motor is no good or the path connecting it to ground is no good!
Idea is that a circuit has to have a full circle for power to get to an item and then also get back to ground to complete the circle!
In this drawing, make sure power is on the red motor wire and ground on the black wire. If that doesn't make the motor run, it is bad.

[SLOweather]

I had this problem January 2022 in OKC with my 2014 Sunstar. I spent hours trying to figure it out.


It wasn't the motor or the resistors. I was CONVINCED it was a bad ground.


Trace the heavy gauge wires from the blower through the lower dash to over near the dirver's foot space. You should find a flat, black connector. (NOT the standard style ones that Winnebego uses.)



That was my culprit. It had gotten so hot from a high resistance connection that the 2 halved had fused together. I cut it out and used crimp butt connectors to replace it.


I'll try to find a picture of it. There is no MFR info or part number on it. And it doesn't show up on any wiring diagram.

[SLOweather]

Here are a coulple of pictures of the offending connector. After I cut it out, I put in the vise nd tapped it with a hammer to get it to pull apart. One side hd the wires from the blower, and one the Winnebago standard white and yellow DC wires.