Temperature Time Switch

[KevinG]

Gang -

I'm trying to run down a battery drain in my '72T, and found that two leads from the 14 pin connector both show continuity to ground that I don't believe should be there. Both of these leads connect to the Temperature Time Switch according to the wiring diagram (1971) that I am using.

Can anyone clue me in on what the Temperature Time Switch does and where to find it so I can check it out?

Thanks,

Kevin

[boyt911sc]

Kevin,

The thermotime switch controls the duration of fuel injection by the CSV (cold start valve). It is located on the left side chain cover (driverside) of the motor. This is actually a grounding device for the CSV governed by time and engine temperature. Don't have a '71 wiring diagram and I maybe wrong, but I don't think TTS is directly connected to the 14-pin connector. The energized terminal of the TTS is connected to the CSV (yellow wire) and the other terminal is grounded to the engine. HTH.

Tony

[KevinG]

Thanks, Tony

I don't have anything mounted on either chain cover, but I recall that some of the sensors were located there on later cars. The only sensor/switch that I have on my motor with two terminals is mounted on the breather cover. When I went out and checked, the blue/yellow stripe and yellow wires that I was tracing were attached. Initial probe showed both terminals grounded, and with the yellow wire removed, the switch correctly showed the the correct polarity.

The yellow wire is grounded, and the only other connection (according to my diagram) is the starter solenoid. I will get the car up in the air tomorrow and check to see whether the yellow wire or the starter solenoid is grounded.

Even so, from what I can see in the diagram there shouldn't be a current draw with the key off from the yellow wire unless there is some grounded connection within the starter itself?? Any ideas??

Thanks again,

Kevin

[RWebb]

you have a 1972 "T", right?

what induction system does it have on it?

[KevinG]

RWEBB -

Induction is MFI, but the cold start system was disabled when I got the car. I saw no reason to enable it.

Kevin