reverse sensor disable for towing?

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tresvatos

Copper - Posts: 102

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Joined: February 02, 2010

Location: Mississippi, United States

Posted: March 14, 2013 at 8:21 PM / IP Logged

Yes! You got it! Use the manual switch. Now what would be the best way to have the SPDT relay disengage when a positive current is provided ? Which pole on the SPDT would the trigger pos. Input need to attach to.?

Thanks!

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tresvatos

Copper - Posts: 102

Joined: February 02, 2010

Location: Mississippi, United States

Posted: March 21, 2013 at 7:33 PM / IP Logged

What would be the best way to trigger the relay to stop connection of the reverse sensor using a positive + input from the switch.? Would i have to use two relays?

Thanks

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oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: March 21, 2013 at 9:25 PM / IP Logged

Sorry! I missed your earlier reply.

Just one relay - an SPDT.

I thought I explained that though a quick check suggests not fully.

The #87a terminal on an SPDT is the Normally Closed contact (to #30).

Hence you run your power (+12V) to the sensor thru 30 & 87a.

When the relay is energised (+12V to 86 & GND to 85), 30 is connected to 87 instead, hence breaking/opening 30 to 87a - ie, breaking +12V to the sensor.

(87 is left unconnected.)

Maybe that's better paraphrased - ie, when energised, relay 30 changes over from 87a to 87.

Sorry if I omitted that detail earlier.

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tresvatos

Copper - Posts: 102

Joined: February 02, 2010

Location: Mississippi, United States

Posted: March 22, 2013 at 9:18 AM / IP Logged

Makes perfect sense now! Thanks

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tresvatos

Copper - Posts: 102

Joined: February 02, 2010

Location: Mississippi, United States

Posted: March 26, 2013 at 12:25 AM / IP Logged

Works with test light exactly as stated.

Thanks so much for all the help!

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reverse sensor disable for towing?

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