Schematic for Heater Blower Relay

[Puckboy106]

I'd like to troubleshoot the 911.618.153.00 relay and controller. Where can I get a schematic? I have seen some of the threads where jumpers are installed for various reasons and work arounds. So maybe someone has a circuit diagram, schematic etc?

Thanks

[86 911 Targa]

Originally Posted by Puckboy106

I'd like to troubleshoot the 911.618.153.00 relay and controller. Where can I get a schematic? I have seen some of the threads where jumpers are installed for various reasons and work arounds. So maybe someone has a circuit diagram, schematic etc?

Thanks

Some owners jumper the REED switch when the footwell blower do not work.




Not a good idea, as the engine mounted heater blower must be operating to prevent the introduction of CO into the cabin.

The Porsche engineers were concerned that if the engine blower was not running, the footwell blowers
might be sucking air though the heat exchangers creating a negative pressure or vaccum resulting in the
introduction of CO in the passenger area due to the loss of the positive air pressure.

As for the relay:



For copyright/proprietary reasons, Hella will not release any of their relay schematics.

If you are able to locate one please post it for the rest of the members.

Best,

Gerry