Re: [DML] How does the thermotime switch work?
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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


You're right, the switch is grounded through the threads to the water pump, 
take the tape off, the sealing ring should be enough to keep it from 
leaking.  You can put a continuity tester between one of the leads on the 
switch and a ground point and if the engine is colder than 95 degrees it 
will show continuity.  I can't say which lead is the ground one, they both 
look the same, the other is from the starter solenoid to prevent flooding. 
Current from the starter solenoid during cranking heats a bimetallic arm in 
the switch to break the ground connection, thus disabling the cold start 
valve.  Take a look at the technical manual for a schematic of how the 
switch functions, it's pretty simple.

Todd Nelson
1561, Vermont

----- Original Message ----- 
From: "Derek" <derek.grozio@xxxxxxxxxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Sunday, June 25, 2006 11:41 PM
Subject: [DML] How does the thermotime switch work?

>I recently did a valley of death teardown and now the car seems to have 
>problems starting
> 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 haven't
> pulled out the multimeter yet to check it. Any comments are appreciated, 
> thanks.
> -Derek #10084 

To address comments privately to the moderating team, please address:

For more info on the list, tech articles, cars for sale see

To search the archives or view files, log in at 
Yahoo! Groups Links

<*> To visit your group on the web, go to:

<*> To unsubscribe from this group, send an email to:

<*> Your use of Yahoo! Groups is subject to:

Home Back to the Home of PROJECT VIXEN

Copyright 2006  All rights reserved.

Opinions expressed in posts reflect the views of their respective authors.
DMCForum Mailing List Archive  DMCNews Mailing List Archive  DMC-UK Mailing List Archive