Originally Posted by L5wolvesf

So I finally got the heater cable clamps in my hands and installed on the heat (Cool - - - Warm) control cable. The lever and the inner cable now both move freely and are attached to the heater control assembly – I can see them move. The other levers and cables seem to work and operate correctly – I can hear the doors/diverters move under the dash.

But I have a problem – the heat control valve (under the hood) does not move when the heat (Cool - - - Warm) control lever is moved. It doesn’t even act like a cable is attached.

Keep in mind I’ve rarely used the heat or A/C in this truck. So my question is:
Is the heat (Cool - - - Warm) control lever supposed to operate the heat control valve (under the hood)?

a. If it does, does the cable go directly to the heat control valve (under the hood) or is there something/part in between?

Originally Posted by osv

did you try disconnecting the cable from the valve, and: 1)see if you can move the valve by itself, 2)see if the cable end moves in and out by itself?

Originally Posted by millball

I know that my '87 and '88 4Runners have two cables attached to the temp control lever. When the lever is moved, one cable opens or closes the hot water valve while the other one opens or closes the air blend door at the same time.

Not sure about earlier model trucks.

Originally Posted by osv

did you try disconnecting the cable from the valve, and: 1)see if you can move the valve by itself, 2)see if the cable end moves in and out by itself?

Originally Posted by millball

When I remove a heater control from the dash, I tie some binder twine, or tough fishing line to the far end of each cable as I disconnect them and use the line to guide the cables back exactly the way they had been run before when it goes back together..