Alarm woe's

[applecrisp]

So I finally bought my alarm and OEM Pre wire harness to aid in installation however I am still rather confused... The pre wire harness has only one wire for each function. For example Door lock (+). But my alarm obviously has both positive and negative for that function so do I just wire it something like this...


Door lock wire on car(+) > Door lock on Alarm harness (+)

Door lock on alarm (-) > chassis ground on car (-)

if this is wrong help me out also my alarm install book doesn't have a guide for anything prewired obviously so what kind of locking system is our cars I have central locking without any buttons...

And finally after dickin around with stuff yesterday I blew the window fuse / replaced it then my airbag light goes on for a few mins then goes out...

[ATF]

Hmmm I don't have the answer to your exact question, but if you're retrofitting the OEM alarm, aren't the cars pre-wired for the factory alarm to just be plug and play? You remove the glovebox & plug in the unit, and hook up the siren under the hood.

If you're installing an aftermarket system, all I can say is goodluck. I've heard bad things about failed attempts @ DIY Aftermarket Alarms.

[applecrisp]

Well yes the OEM alarm is just plug and play however I bought a Viper 5002 and am trying to use the pre wiring however as I believe I mentioned the viper install manual doesn't show you how to do it with the prewiring rather from scratch... which would take forever!

[applecrisp]

Hey So I installed my viper 5002 yesterday however after connecting the viper harness shown in bold to the respective bmw pre wire alarm harness the trunk trigger doesn't work nor do the flashing lights on arm or disarm.

(-) 200 mA Channel 2 output Nothing
(+) Constant 12v power input Pin 1 12v constant
(+) siren outputNothing
(+) Switched Ignition input, zone 5 Pin 2 Ignition
(-) Chassis ground input -12V Ground
(+) Door Trigger input, zone 3(+) 12v
(-) instant Trigger input (trunk input/shunt) zone1 pin 11 trunktrigger
(-) Door trigger input zone 3 Pins 4 and five door trigger
Domelight supervision input (-) Domelights Pin 12
(-) 200mA channel 3 programmable output nothing
(+)(-) selectable Light flash output Pin 8 hazards
(-) 500mA Ground when armed output Chassis ground pin 3

there is also the lock and unlock however that is on a different harness on my alarm and all seems to working dandy. (which makes up for pins 9 and 10 as well as 6 because its only 2 door )

Anyways If someone could give this a quick look over and tell what right/wrong that would be great.. thanks PS if I can figure this out I'll make a beat DIY as I can't seem to find any for any aftermarket alarms