The Ford Barn

BL in NH · 08-01-2013, 08:23 PM

On a two prong temp sending unit, does it matter what prong the wire to the dash guage attaches too? Long one or short one! Thanks

Old Henry · 08-01-2013, 08:47 PM

Doesn't matter. It's just a switch like a light switch. Current can go either way.

Here's a diagram of the system to better understand how it works:

Close up diagram:

Ralph Moore · 08-01-2013, 09:15 PM

So it looks like one side gives temperature and the other is just an on/off switch?

Kurt in NJ · 08-01-2013, 09:25 PM

Yes, when the 2 wire one reaches the set temperature the gauge will peg hot ---it is one way to know which side has the problem, if the gauge suddenly goes "hot" it is usually the 2 wire side, if it goes hot gradually it is usually the 1 wire side

Bluebell · 08-01-2013, 09:30 PM

Based on the picture, I would hook the gauge to the long one. just in case.

Old Henry · 08-01-2013, 09:45 PM

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Quote:

Originally Posted by Bluebell

Based on the picture, I would hook the gauge to the long one. just in case.

Whichever side the wire gets to first coming up from the wire loom on the left side of the engine. So, whichever terminal ends up on the driver's side of the engine when it's screwed into the block tight.

08-01-2013, 08:23 PM	#1
BL in NH Member Join Date: Apr 2011 Posts: 38	Temperature Sending unit question On a two prong temp sending unit, does it matter what prong the wire to the dash guage attaches too? Long one or short one! Thanks

08-01-2013, 08:47 PM	#2
Old Henry Senior Member Join Date: Oct 2010 Location: Orem, Utah Posts: 5,762	Re: Temperature Sending unit question Doesn't matter. It's just a switch like a light switch. Current can go either way. Here's a diagram of the system to better understand how it works: Close up diagram: __________________ Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” Ursula K. Le Guin in The Left Hand of Darkness Last edited by Old Henry; 08-01-2013 at 08:52 PM.*

08-01-2013, 09:15 PM	#3
Ralph Moore Senior Member Join Date: Oct 2010 Location: North Pole, Alaska Posts: 1,470	Re: Temperature Sending unit question So it looks like one side gives temperature and the other is just an on/off switch?

08-01-2013, 09:25 PM	#4
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Temperature Sending unit question Yes, when the 2 wire one reaches the set temperature the gauge will peg hot ---it is one way to know which side has the problem, if the gauge suddenly goes "hot" it is usually the 2 wire side, if it goes hot gradually it is usually the 1 wire side

08-01-2013, 09:30 PM	#5
Bluebell Senior Member Join Date: Nov 2012 Location: Tauranga, New Zealand Posts: 726	Re: Temperature Sending unit question Based on the picture, I would hook the gauge to the long one. just in case.