12V Relay Not Triggering

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julio225

Member - Posts: 11

Joined: November 16, 2017

Location: France

Posted: November 28, 2017 at 11:01 AM / IP Logged

Well, i've tried everything i could but nothing is working.

I'm giving up, my factory alarm is still working sono guess i'll cary arround my 2 remotes ^^

Thx for the help :-)

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santaana66

Member - Posts: 1

Joined: November 01, 2007

Location: Texas, United States

Posted: January 11, 2018 at 10:33 AM / IP Logged

I have a similar question.... I'm trying to get either the 820ohm or 330ohm negative signal coming from an 03 Ram to trigger a relay.... the signal isn't strong enough to trigger the relay, how can I amplify the signal?

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: January 11, 2018 at 11:04 AM / IP Logged

Measure the voltage on those two wires, DMM to 20VDC, red probe to a 12V+ constant, black to each wire and measure the voltage,

let's say you get 5 volts, then use a relay from Mouser, Farnell etc with a 5 Volt coil.

A regular 12 volt automotive relay won't work below around 7.5 volts.

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