T3: Prongs on the Intake Air Temp Sensor

["northaven@worldnet.att.net" <northaven@postoffice.worldnet.att.net>]

My diagnostic computer says that there is a problem with my intake 
air temp sensor (the one that lives below and to the right of the 
intake air distributer and underneath the air cleaner).  I have a '69 
FI AT Fastback with the original modified cold start system.

The sensor on my car has one prong.  According to the book (How To 
Keep Your Volkswagen Alive) and the parts dealer, it should have two 
and that it can be tested via the brain connectors 1 and 13.  We get 
infinity with both pins and the single wire connected to our single 
prong sensor.

Question:  Is my particular car supposed to have a one or two prong 
sensor?  If it's supposed to have a one-prong sensor, where does the 
other wire go?  And where would I find it?

Becky
'69 FI AT Fastback w/original modified cold start system