Heater blower

[Rocky05]

How do I bypass the resistor? Running on high is fine with me

Not sure if that is a good idea, bypassing the resistor block permanently might overheat the motor.

Looking at the wiring diagram, it appears that there is some resistance even in the high mode...IOW, it never runs at full 12V.

Electrician here:  if it can't run at 12.6 volts the battery puts out, it can't run at the 15+ volts the alternator puts out.

These DC motors are very robust.

[Rocky05]

Here is the route for the blower power for heater function.

At control switch arrives the 14Bk wire power (from Acc) which fill feed either the Heater function (14BR) or the A/C-Vent function (14T) to the speed switch, but not both at the same time.

The brown line will run through all the resistors up to the blower. So will get the more reduced voltage rate of all, so the lower speed posibility, including the A/C Low speed.

With this selection, all other power splices can be despited since will be running practically to nowhere or buckling into the same existant resistor circuit with power already reduced. Except the one for the time relay to the compressor what will be activated anyway straight from control switch (no resistor up to the TDR)



I can explain how the speeds selector setup works on this network if required.

Okay brother, take a breath.  That diagram is the exact same on my 1968 with AC.

It doesn't show a: speed motor, it shows 3 resistors to control the speed of an AC motor.

Your A/C and Defrost will be the same fan speed.

You don't know defrost in Venezuela except it keeps moisture from fogging the windscreen from the inside.

[Nacho-RT74]

Diagram is indeed 68/70

I know what speed is each resistor because the wire arriving to it. Each color wire corresponds to to each speed. And by ohms law, still with all the circuit hot, the power will run throught the less resistance path and that's what makes the speed selection.

Yes I know what is defrost! Do you think I'm an idiot?

And no... the defrost speeds are not necessarily the same than A/C and Fan... due the extra resistor used JUST on the defrost function (the one circled)

If you don't want help, just let me know.

(BTW reanalalizing this noticed  that I could made something wrong on my relay upgrade for the blower but will take long time to confirm it))