Heater Blowers

[kqw]

Tracing an issue with my heater blowers in the foot wells and engine compartment. ('85 Carrera)

When I pull the levers between the seats, the blowers do not activate. The blowers are not frozen and wiring is fine.

However, when I pull the levers I hear a click from the relay located in the engine compartment.

Is it time to replace the relay?

Thanks in advance

[Joeaksa]

Fox,

Do a search on this, Kurt V was working on this very same system recently recently and lots of info there.

JoeA

[DonMo]

In a carrera the footwell blowers won't work unless the engine compartment fan is working. Does your fan on the driver's side of the engine compartment work? It needs the resistance of that motor being on to tell the footwell blowers to blow.

[masraum]

That would be the first thing I'd check too (assuming you know that all of the various fuses are good). Is the engine blower running? If not the others won't work either. Actually what you want is for the relay to click. That should hopefully mean that the switch is being closed.

[kqw]

Thanks folks,

None of my heater blowers are activating.

Masraum, you mention fuses. I don't believe these blowers are fused. Am I missing something?

Thanks

[masraum]

I put that since you don't have the year of your car anywhere in your post. They added inline fuses to the footwell blowers in '86 or '87.

If your engine blower isn't working you need to make sure it'll run when given power, if it will then you need to find out why it's not getting power.

[Kurt B]

I had the same problem. You can override the footwell blowers by connecting a combo of wires between the seats. With the heater levers up, the footwell blowers will kick in and give you plenty of heat--much more than just having the heat waft in there with no fans.

As I said in the other post, I hooked up a little switch for these. It's not an intuitive set of wires, so I do not recall which and would have to look. A combo of 3 have to be connected I think.

Like you, I could not and cannot get the engine blower to work. It is fine--I hooked it up to the battery and and blew like crazy. I checked the fuse.

I even followed the wiring diagram to see if any combo of wire connetions up front would give me any change back there to kick it in, but nothing. I have no idea how the goddamned thing works.
I may take another stab at it later.

[CBRacerX]

Kurt,

Let us know - we would like to see what you did to resolve this!

Thanks!!!

Chris

[steve911]

Check to make sure that third slide control on your dash is moved far LEFT, not over to defrost (far right). I don't think the footwell blowers work when the 3rd lever is to the right.

check out this thread for a diagram of the heating controls

[kqw]

Ohm'd out the connector to the blower in the engine compartment and the leads were hot when switched on.

Soooo, I pulled the fan motor and applied 12V power.

Nothing..Hmmm.

Took the blower motor apart and found that one of the brushes had crumbled apart and the other brush was on it's last leg.

Will seek out new brushes tomorrow.

Thanks all.

[Thack]

Usually a click from the relay means the relay is good. That is the job of the relay to electrically switch another switch. An eletromagnet pulls the trigger when a small amount of current is applied to the relay.

Mike

[kqw]

Thanks Mike..

I believe I have found the problem...

[kqw]

Problem solved....

New brushes installed in the heater motor and it's running fine, including the footwells. $20.00 total vs. $436.00

Thanks,