1995 BMW 318i alarm/remote start
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=47534
Printed Date: July 04, 2025 at 7:00 AM
Topic: 1995 BMW 318i alarm/remote start
Posted By: urafreak
Subject: 1995 BMW 318i alarm/remote start
Date Posted: January 12, 2005 at 12:47 PM
hello there. been trying for 3 days with no luck, please help!! i'm installing an aftermarket alarm/remote start system in my car. i have the alarm working fine but can't get the power locks to work. i have posted the door lock diagram from my alarm install manual, can anyone please tell me which figure to use?
 also for the remote start i need to locate the oil indicator light wire under the dash. the remote start must be hooked into this or it won't work. anyone know where i can find this wire? i have already tried to ground it instead with no luck. here is the diagram. and thanks in advance
Replies:
Posted By: meltingplastic
Date Posted: January 12, 2005 at 1:08 PM
let me guess.. this alarm needs +12 when runnin.. i answered this question before in anohter post... check out this diagram for a 12v monitor..
https://www.s10forum.com/forum/showthread.php?t=111646
Dont put an led in there.. set it up with 2 relays instead.. meter it out and adjust the pot switch so that when theres 14v(or whatever voltage ur car shows when its running) it puts 12 volts to the wire.. and then hook up another relay and have that ground out the wire when its under the 14v.. this is what that other alarm needed.. not so sure its what urs needs but it will work..
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Driving a Bagged, Caddied 02 s10
Posted By: urafreak
Date Posted: January 12, 2005 at 1:35 PM
meltingplastic wrote:
let me guess.. this alarm needs +12 when runnin.. i answered this question before in anohter post... check out this diagram for a 12v monitor..
https://www.s10forum.com/forum/showthread.php?t=111646
Dont put an led in there.. set it up with 2 relays instead.. meter it out and adjust the pot switch so that when theres 14v(or whatever voltage ur car shows when its running) it puts 12 volts to the wire.. and then hook up another relay and have that ground out the wire when its under the 14v.. this is what that other alarm needed.. not so sure its what urs needs but it will work..
thanks very much for the reply, but your way over my head here.... why do i need that 12v montior just to get the power door locks working? can not one of those figures on my diagram suit my car?
Posted By: meltingplastic
Date Posted: January 12, 2005 at 1:46 PM
lol that was for the oil light thing.. shoulda mentioned that.. i cant really read ur diagram for the doorlocks so im lost on that...
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Driving a Bagged, Caddied 02 s10
Posted By: meltingplastic
Date Posted: January 12, 2005 at 1:51 PM
Power Lock WHITE/ red + factory alarm plug
Power Unlock blue/red + factory alarm plug
Notes: The alarm plug is a black 12 pin plug located just behind the glove box. It is mounted with the pins facing you atop a vent just to the left of the body computer.
Just need to put 12volts to that.. just meter it out and it should work.. if ur lock and unlock wires are negative.. u need to switch the polarity on them using relays..
85 - 12v
86 - lock or unlock trigger from alarm
30 - 12v
87 - to lock or unlock wire
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Driving a Bagged, Caddied 02 s10
Posted By: urafreak
Date Posted: January 12, 2005 at 2:02 PM
meltingplastic wrote:
Power Lock WHITE/ red + factory alarm plug
Power Unlock blue/red + factory alarm plug
Notes: The alarm plug is a black 12 pin plug located just behind the glove box. It is mounted with the pins facing you atop a vent just to the left of the body computer.
Just need to put 12volts to that.. just meter it out and it should work.. if ur lock and unlock wires are negative.. u need to switch the polarity on them using relays..
85 - 12v
86 - lock or unlock trigger from alarm
30 - 12v
87 - to lock or unlock wire
thanks for the reply. i know my vehicle is + for both lock and unlock (positive pulse). the below is from the manual.. do i need a relay? Orange -> Central lock module white -> Unlock^ Yellow -> Negative Orange Black -> Central lock module White Black -> Lock^ Yellow Black -> Connect to Yellow for close circuit The yellow black is connected to the yellow, and then yellow connected to the common line. This way the circuit is "closed"; otherwise the connection won't work. ^ White and White Black are exchangeable if needed. Note: Common line = negative polarity, NOT ground
Posted By: meltingplastic
Date Posted: January 12, 2005 at 2:04 PM
im lost lol.. that doesnt make any sense to me.. i guess meter out THOSE wires lol and see whats reacts when u hit lock and what reacts when u hit unlock and take it from there..
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Driving a Bagged, Caddied 02 s10
Posted By: urafreak
Date Posted: January 12, 2005 at 2:10 PM
meltingplastic wrote:
lol that was for the oil light thing.. shoulda mentioned that.. i cant really read ur diagram for the doorlocks so im lost on that...
all this for that bloody wire? man o man! i don't think i'm skilled enough to do that. it says this in the manual about the wire. One yellow wire from the main module connects to oil light / tension coil. Yellow -> Oil indicator light/High tension wire This wire must be connected to activate the remote start function. There are two ways to connect this wire. It can be connected to (1) the oil indicator light* or (2) the high tension wire** (see Page 14). * The oil indicator light should be on the dashboard. It usually blinks when starting up the vehicle. ** The high tension wire method is recommended only for older vehicle. thanks again.
Posted By: meltingplastic
Date Posted: January 12, 2005 at 3:02 PM
the way ive seen it is that it requires 12v when the car is running.. the oil indicator light gives it that.. instead of tapping into that light if u cant find it.. that curcuit will mimic it by making ur own voltage sense meter... i wonder if this can even be used to program the tach lol
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Driving a Bagged, Caddied 02 s10
Posted By: urafreak
Date Posted: January 12, 2005 at 4:03 PM
thanks for the reply again. could i not just put it with the 12v constant wire then?
Posted By: meltingplastic
Date Posted: January 12, 2005 at 4:32 PM
u could BUT.. then if ur remote start doesnt catch.. the unit wont know that.. it'll think it took each time.. so
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Driving a Bagged, Caddied 02 s10
Posted By: urafreak
Date Posted: January 12, 2005 at 5:04 PM
hmmm. just read somewhere that this wire could also be hooked up to the ignition coil... does this sound like a good idea? i can actually find those wires by the sprakplugs...
Posted By: meltingplastic
Date Posted: January 12, 2005 at 5:14 PM
not sure never tried.. dont know if theres a voltage requirement cause thats basically hooking it up to the tach wire
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Driving a Bagged, Caddied 02 s10
Posted By: urafreak
Date Posted: January 12, 2005 at 9:31 PM
must be something like that. i just need to find the coil wires. do you know if they are the ones that hook right to the sparkplug?
Posted By: urafreak
Date Posted: January 13, 2005 at 3:14 PM
found the oil light wire finally. gonna test it out tonight....
Posted By: urafreak
Date Posted: January 13, 2005 at 10:46 PM
95 bmw 318i. got the remote start and alarm installed.... just two problems... 1. Remote start does not work unless key is in the ignition in the "on" position 2. Power Locks don't work unless key is in the ignition in the "on" position Something to do with BMW's and EWS (a chip in the key)... i think. Help!!!!!
Posted By: vinman75
Date Posted: January 13, 2005 at 11:13 PM
you need to use a bypass module in that car. I usually use an extra key in a d.e.i. 556u module. There is also a tech fax document for your car. Don't have it in front of me but I can get it for you.
Posted By: urafreak
Date Posted: January 13, 2005 at 11:21 PM
thanks for the reply! can i make this module myself? is there another way without having an extra key (i only have one)?
Posted By: urafreak
Date Posted: January 14, 2005 at 12:37 AM
power locks work now... mis-wired them... any ideas about how to bypass this ews without module and extra key???
Posted By: meltingplastic
Date Posted: January 14, 2005 at 11:12 AM
the only way i know about making the key thing work is by wrapping i think its like 120 coils of copper around the key... dont remember if thats the correct amount or not.. i know its more than american cars.. but id rather use a 556u.. dont trust the programming on other units
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Driving a Bagged, Caddied 02 s10
Posted By: Ravendarat
Date Posted: January 14, 2005 at 11:28 AM
You can use a DEI 555B to bypass the factory imobilizer without using a key. As to my knowledge you cant just make one without using an extra key. Just use the bypass and dont piss around trying to make one. These german cars can be tempremental, and expensive in you make a mistake :)
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: urafreak
Date Posted: January 14, 2005 at 6:13 PM
thanks for all the replys guys. i really appreciate it... i bought a "auto tran"" transponder bypass kit and am getting a key cut. without you guys and this site i would not have been able to install. cheers.
Posted By: xtreme069
Date Posted: January 16, 2005 at 6:36 AM
not sure if you got past the oil indicator light. As far as i can see this wire sees ground at rest and +12v when the car has started so that the alarm can tell when when to stop cranking the starter if your having trouble finding this wire without taking the speedo cluster out i'm pretty sure that the fuel pump wire does the same thing just make sure you test with a DMM or beagle and remember the airbag module could be under the rear seat so be carefull not to probe those wires so you don't set off the airbags good luck
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