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Old 05-11-2006, 12:28 PM
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how to connect wiring to sending unit

Hey all,

I know this is kind of a stupid question but, how do you connect the temperature sending unit wire to the temperature sending unit? I have a 350 chevy motor and i never had the connector. The sending unit has the button terminal on it, for use with a gauge. Thanks all
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Old 05-11-2006, 03:38 PM
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Quote:
Originally Posted by zipfactor
Hey all,

I know this is kind of a stupid question but, how do you connect the temperature sending unit wire to the temperature sending unit? I have a 350 chevy motor and i never had the connector. The sending unit has the button terminal on it, for use with a gauge. Thanks all
Doc here,

ZIPFACTOR:

No such thing as a "Stupid Question" ... except for the one that comes out.."Now how did I manage to do this?"

The Temp Sender is simple..For GM SBC's It comes in two Flavors..

one has a Rubber Plug on top of the sender and two blade ~like Connectors on it..Later model type with (usually a temp reporting wire for the ECU) This is not what you described..

The other is a Single terminal unit that screws into the head or water neck or manifold , and uses the sender Body as a ground. The Top single terminal is "Rounded" and accepts a "Slide terminal" Just hook your sender wire to there, and your good to go!

If you don't have the terminal, or lost the stock clip, or it burned up and fell apart under heat, you can use a regular Slide Terminal from a crimp kit..Blue usually works, but red may be needed for a tighter fit.

The senders work Based on Resistance to ground from the gauge to sender...Depending on the system , as it gets hotter the sender heats a bimetallic strip that changes the resistance to the gauge..Ergo, the gauge go high or low..as it cools the strip changes direction and the gauge follows suit.

The important thing to remember here is , is the gauge matched to the resistance of the sender? If it's all stock , then your fine, If you have aftermarket Gauges, you may have to match the sender to the Q of the gauge circuit..

They come in 0 to 30, 0 to 60, 0 to 90..all the way up to 0 to 290 Ohms resistance..the gauge must match the resistance of the sender to be accurate or work at all..Check your instructions if aftermarket.

Doc
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Old 05-12-2006, 11:34 AM
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thanks doc, appreciate the help as always!
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