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wiring relay to output 12v


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bicky 
Member - Posts: 6
Member spacespace
Joined: February 26, 2012
Location: Ontario, Canada
Posted: August 15, 2015 at 4:28 PM / IP Logged Link to Post Post Reply Quote bicky
hi, the brake pedal in my car outputs 2.5ish volts and I need 12v for my aftermarket push start system to work. So I was thinking of using a relay so when I push the brake pedal it outs 12v. So if I wire it as shown below will this work?
87 - outputs 12v to aftermarket push start system
86&30 - fused 12v
85 - brake pedal wire
icearrow6 
Copper - Posts: 497
Copper spacespace
Joined: February 02, 2009
Location: California, United States
Posted: August 15, 2015 at 5:30 PM / IP Logged Link to Post Post Reply Quote icearrow6
THis will NOT work, and you could send +12v to the pedal wire potentially damaging the unit.
Please post year, make, model.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: August 16, 2015 at 1:20 AM / IP Logged Link to Post Post Reply Quote howie ll
Use the 12Volt feed to one of the brake lights.
hotwaterwizard 
Silver - Posts: 1,350
Silver spacespace
Joined: December 11, 2003
Location: California, United States
Posted: August 19, 2015 at 10:22 PM / IP Logged Link to Post Post Reply Quote hotwaterwizard
2.5ish??? Almost sounds like A SCR Would do the trick.
http://http://www.onsemi.com/pub_link/Collateral/C106-D.PDF
John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: August 19, 2015 at 11:52 PM / IP Logged Link to Post Post Reply Quote howie ll
Not needed it translates out to 12 volts at any of the brake light feeds i the floor looms.
bicky 
Member - Posts: 6
Member spacespace
Joined: February 26, 2012
Location: Ontario, Canada
Posted: August 21, 2015 at 3:20 PM / IP Logged Link to Post Post Reply Quote bicky
thanks guys for the replies, I took howie ll advice and the used the brake light feed. thanks.
bicky 
Member - Posts: 6
Member spacespace
Joined: February 26, 2012
Location: Ontario, Canada
Posted: August 21, 2015 at 3:26 PM / IP Logged Link to Post Post Reply Quote bicky
thanks guys for the replies, I took howie ll advice and the used the brake light feed. thanks.

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