relay help and advice

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=33787
Printed Date: July 23, 2025 at 4:34 PM

Topic: relay help and advice

Posted By: alicia4917
Subject: relay help and advice
Date Posted: June 13, 2004 at 5:56 AM

hi to all

need to bypass factory alarm to start car (fuel pump not working and engine check light on)

i have been told to do this: get relay connect wire from 30a to fuel pump live wire,connect wire from 86 to chassis groun(earth),and connect from87 to ignition live wire(+12v)

does this sound ok somebody mentioned something about fuseing each of the wires

please help my car has been sat there for 8 weeks now and i am p*$$# off

thanks

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c.a.t

Replies:

Posted By: draasch
Date Posted: June 13, 2004 at 10:16 AM

if 86 is ground, then 85 needs to be 12v.

do you mean 87a??

when the relay is at rest pins 30 and 87a are connected.

when you add power and ground to the relay, pins 87 and 30 connect.
https://www.the12volt.com/relays/relays.asp

the one in the middle is not energized....the one on the right is energized

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Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt

Posted By: alicia4917
Date Posted: June 13, 2004 at 12:23 PM

yeh thanks alot mate,

just one more thing about the fuses, will i need to fuse each wire just to be on the safe side or does the relay do the job

tanks

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c.a.t

Posted By: draasch
Date Posted: June 13, 2004 at 12:49 PM

put a fuse on the 12v wire.........i would try a 10 amp at first, then up from there....just dont go to high

-------------
Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt

Posted By: alicia4917
Date Posted: June 13, 2004 at 4:25 PM

will do thanks alot mate

-------------
c.a.t

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