blower lost its lower speeeds

[garyia]

All,

On a '95 B2300, the blower motor normally has four speeds. Mine has lost the first three. It will only blow on the highest speed. On "MAX AC", it blows a little faster.

I have located the blower fuse, but it is good. If I pull it, the blower won't work at all, on any speed.

Is there some other fuse or circuit-trip that isn't mentioned in the manual? Any ideas? Could it be the switch? Or the motor? Or a solenoid?

Please help. TIA

Gary A.
Maryland

 

[Hazmat Ranger]

Gary according to a Diagram I have, there is a blower motor resistor assembly (95 Ranger) in the right rear of the engine compartment. I do not know what it looks like, but the Orange/Black wire from the blower motor goes to it. This assembly limits the amount of energy to the motor thus setting the speed. This assembly may be your problem, again I am not sure of the diagram for my Ranger will be the same for your Mazda, but at least it is a start. Also, check your relay, although I think if it went bad then NO blower at all. The relay should be in "Relay Box 2" according to the diagram.

Hope this helps - good luck

 

[4x4junkie]

Agreed, sounds like an open blower motor speed resistor.

On my '94 it's on the evaporator housing, although I can't say for sure it's the same on a '95. Someone else can probably chime in on it.

(moving to Electrical)

 

[Jason]

It's ALWAYS the resistor if you only lose the slow speeds. Cheap fix too.

 

[the truck doctor]

definately the problem,its actually very common especially if you live somewhere like here in canada where you use your fan like half the year, lol it crapped out on my 94 exploder, 98 exploder and my 01 mazda B3000, and even if you have to go to the stealership its still relatively cheap

 

[MAKG]

It's ALWAYS the resistor if you only lose the slow speeds. Cheap fix too.

I don't know if I'd go as far as "always," but it certainly is extremely common. I suppose you could hose the switch itself in just the right way or get multiple wiring failures.

I certainly agree this is very likely, but I'd look first. The resistor has no insulation, so you can spot opens very easily. Make sure you pull it out with the engine COLD, as that resistor can get surprisingly hot.

 

[Bob Ayers]

I don't know if I'd go as far as "always," but it certainly is extremely common. I suppose you could hose the switch itself in just the right way or get multiple wiring failures.

I certainly agree this is very likely, but I'd look first. The resistor has no insulation, so you can spot opens very easily. Make sure you pull it out with the engine COLD, as that resistor can get surprisingly hot.

In his case, the resistors will be stone cold, since they are open.