Re: [DML] How does the thermotime switch work?
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Re: [DML] How does the thermotime switch work?

The thermotime switch grounds through the pump, then engine block, then ground strap.  It receives +12V when cranking via the starter solenoid (red/white wire).
Teflon tape is unnecessary.  One of the vendors once told me that if you look at the switch and you see that brown colored dot on the side of it, and the dot is cracked, discolored, or damaged, then the switch should be replaced.  Check to make sure the electrical plug is OK and also use a meter to verify +12 at cranking when the engine is stone cold.  I think it should have power for something like 8 seconds?
-----Original Message-----
From: Derek <derek.grozio@xxxxxxxxxxx>
To: dmcnews@xxxxxxxxxxxxxxx
Sent: Mon, 26 Jun 2006 03:41:03 -0000
Subject: [DML] How does the thermotime switch work?

I recently did a valley of death teardown and now the car seems to have problems 
when cold. The only thing I really touched thats involved in the hot/cold start 
circuit from 
what I can tell is the thermotime switch. I removed it from my old water pump 
and replaced it 
in the new one. My question is, does the switch threads use the water pump as a 
ground? I 
put teflon tape around the threads before reinstalling. This is my only idea so 
far, as I do not 
know how this circuit works (what is being sent and triggered by the switch) and 
pulled out the multimeter yet to check it. Any comments are appreciated, thanks.

-Derek #10084

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