relay wiring replacing with a thin wire
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=107904
Printed Date: June 01, 2024 at 5:11 PM
Topic: relay wiring replacing with a thin wire
Posted By: jitru28
Subject: relay wiring replacing with a thin wire
Date Posted: October 03, 2008 at 12:21 PM
I have a Bmw e36,1994 and my sunroof stopped working when i pressed the switch nothing happens.I discovered the cause it was a relay located under dash a SPST relay.terminal 30= 12+volt alltime 5mm diameter wire,terminal 87= to sunroof switch 2mm diameter wire,coil-terminal 85 =12+volt 5mm diameter,terminal 86= ground, a thin wire from ZKE(-central unit of car).The fault-the ground was dead from ZKE no output to terminal 86 to close relay.Since i did not found the fault,and no ground switched trough ignition(i want sunroof to work only with ignition on),i cut 85,86 terminal wires and i put terminal 86 to ground alltime,and 85terminal to a 12+ switched trough ignitio.I used for 85 terminal a 12+ v signal from accesory a thin wire about 1mm diameter. Is that a problem,because as i mentionedthe original 85terminal had a 12+v wire wich was about 5mm diameter?COuld i burn something like accesory wire?
Replies:
Posted By: howie ll
Date Posted: October 03, 2008 at 2:18 PM
This is going to get involved but there is no way 85 would be 5mm, that's the US 8 gauge with 100 + amps capacity! The relay should read 87, perm 12v+, 85 to ground, thin brown, 86 to ignition and 30 to swtch. To make this work off igniton simply join the wires at 87 and 30.
Posted By: jitru28
Date Posted: October 04, 2008 at 4:25 AM
This is true the 85 terminal was about 4-5mm permanent 12v this surprized me too,and 86 thin 1mm ground.So it was likw this: 85-permanent 12v -4-5mm,86-ground from ZKE 1mm 30-permanent 12v 4-5mm,87-to sunroof switch 2,5mm now i put: 85-12v from ignition 1mm,86-permanent ground 1mm and 30,87 i left as before. Is this a problem,why was the 85 4-5mm diameter i know relays do not need so large wire?
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