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Author Topic: Idiot light wires....  (Read 2798 times)

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Offline Yummi

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Idiot light wires....
« on: July 12, 2010, 09:14:05 PM »
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Offline Nutz4sand

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Re: Idiot light wires....
« Reply #1 on: July 12, 2010, 09:22:17 PM »
Not totally sure of what all you have but any time I have ever seen a light with only one lead it grounded thru the dash and the plug in for it was for the signal juice to enter.
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Offline Yummi

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Re: Idiot light wires....
« Reply #2 on: July 12, 2010, 09:30:47 PM »
The light has two leads - the sending unit has a single blade.
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Offline Nutz4sand

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Re: Idiot light wires....
« Reply #3 on: July 12, 2010, 09:36:02 PM »
Quote from: Yummi on July 12, 2010, 09:30:47 PM
The light has two leads - the sending unit has a single blade.

Like the first pic? I thought that was what you were talking about finding.

With a setup like that the sensor grounds out the light (to the block or manifold) to light it. So one wire from the light goes to the sensor. The other to 12 voltz.   
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Offline Yummi

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Re: Idiot light wires....
« Reply #4 on: July 12, 2010, 09:38:06 PM »
Appears that way - it appears that i have a sending unit that is not hooked up - single blade - close to temp sending unit.....  so i figure it is temp idiot light sending unit?  If it is a single pole it must be a gound circuit would be my guess?
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Offline fabr

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Re: Idiot light wires....
« Reply #5 on: July 13, 2010, 05:58:08 AM »
"sending unit" is a poor name for a single lead "sender". It should be called a "grounding unit". A single lead only grounds. Multi lead "senders" pass 12V through to gauge OR to ground.
« Last Edit: July 13, 2010, 06:00:39 AM by masterfabr »
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Offline Jerry

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Re: Idiot light wires....
« Reply #6 on: July 13, 2010, 06:33:08 AM »
My Spal temp sender is like yours it grounds outwhen it gets hot and makes the fan come on there is a relay involved.
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