[Vwdiesel] what coolant temp sensor to use on the back of the head for glow plug wire?

[Roger Brown]

Bryan Belman wrote:
> Some final things I want to fix. The sensor was not working at all and my glows
> were on the full 7 seconds all the time, cold and hot.
> I had 3 of them in a box, so I did some testing, not sure which one to use.
> Cold, it should give me almost no resistance from body to connector tip and the
> hotter it gets the more resistance I would think?
> 
> I tested one that said 125 degrees C
> But what I found was resistance of about 1,000 ohms cold and down to 300 ohms
> when put in boling water, so that is the wrong sensor.
> 
> does anyone know if my test was wrong and have a link to the correct sensor.
> This 125C sensor does work, but I do not get a very glow plug light, only about 3 seconds.
> None when hot, which is correct.  I just think there is a different sensor that would give me a longer glow time when cold.  I can not seem to find it anywhere.  I have spent some time on Vagcat but no luck yet.  Pretty sure 0-125C is a temp sender, not for the glow plug sensor.

Below is some information I gathered from the sender in my old '81:
	http://www.4crawler.com/Diesel/CheapTricks/GlowPlugs.shtml#TemperatureSensor

-- 

   Roger