[aj88cab]

Originally Posted by 911M491

After jumping the reed switch, my fw blowers ran all the time even with the levers down with three speeds 0/1, 2 and 3. I jumped the two solid wire ends before and after the coil.

That is the issue with just jumping across the reed switch. The FW blowers run continuously regardless of the position of the levers.

Originally Posted by 911M491

Is it correct that this is the mod for eliminating the engine blower and only using the fw blowers? Is there a different mod that still uses the engine blower with the levers and the fw blowers that when the engine blower is on (levers up) the fw blower will run at what ever switch setting (0&1 slow, 2 mid and 3 high)? Is this the mod that jumps on the circuit side or another jump? Thanks for your help with this.

This is the mod you need to do to NOT have the FW blowers run all the time. This would work to run the FW blowers whether you have the Engine blower or not, and the FW blowers would turn off when the levers are down.

http://forums.pelicanparts.com/porsche-911-technical-forum/388445-carrera-removing-engine-compartment-heater-blower-6.html#post7669605

You mentioned that your FW relay was bad and you replaced it, so I don't know how that will fit into the scheme. The picture of your relay replacement didn't post, but if you use Pin 5 to power the coil of the replacement relay I think it should work.

And just to complicate things If you are using replacement relays you might want to abandon the original control circuit board and just use the method described in the posts by scarceller earlier in the above thread...