Reed switch staying permantly closed

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phamine

Copper - Posts: 88

Joined: March 19, 2003

Location: United States

Posted: July 28, 2003 at 3:34 PM / IP Logged

I'm using a normally open reed switch for a fuel kill. But i've noticed that 2 reed switches I've used have stayed closed after a few uses. Here's the diagram I used:

http://www.ae92gts.com/downloads/cutout.doc

What should I do to keep the reed switches from staying closed. They stay closed after i remove the magnet to actuate them.

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cool_greg

Copper - Posts: 125

Joined: February 20, 2003

Location: New Zealand

Posted: July 28, 2003 at 5:29 PM / IP Logged

most likley find that the reed switches can't handle the current needed to energize both the relay and fuel cutout, and the contacts are fusing closed, i suggest you use the reed switch to switch another relay which in turn switches the other relay and fuel cutout

Just a Guy, Wiring up those Vehicals

---------------------------------

Gool_Greg

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xetmes

Silver - Posts: 586

Joined: May 18, 2003

Posted: July 28, 2003 at 6:47 PM / IP Logged

Yea most reed switches cant hadle much current, i would definitly use it to drive something else pref a transistor or if capable a relay.

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phamine

Copper - Posts: 88

Joined: March 19, 2003

Location: United States

Posted: July 28, 2003 at 7:44 PM / IP Logged

cool_greg wrote:

most likley find that the reed switches can't handle the current needed to energize both the relay and fuel cutout, and the contacts are fusing closed, i suggest you use the reed switch to switch another relay which in turn switches the other relay and fuel cutout

How would I wire it so it would do what you mentioned?

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xetmes

Silver - Posts: 586

Joined: May 18, 2003

Posted: July 28, 2003 at 8:00 PM / IP Logged

here is what i would do...

oops i cant seem to upload the diagram... maybe ill try later Reed switch staying permantly closed -- posted image.

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cool_greg

Copper - Posts: 125

Joined: February 20, 2003

Location: New Zealand

Posted: July 28, 2003 at 8:19 PM / IP Logged

just wire the relay contacts where the reed switch was, put one side of the coil to ground, and the other side of the coil thru the reed switch to the 12+ factory fitted supply wireto fuel pump (I tried to uplod a picture but it would work - who knows why?)

Just a Guy, Wiring up those Vehicals

---------------------------------

Gool_Greg

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Reed switch staying permantly closed

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