I bought an aftermarket alarm to install in my Max since it does not have keyless entry or a factory alarm (crime guard 533i).

I intend to do the install myself and after looking through the manual most of it looks pretty easy, but I did have a couple of questions (the other one is in a separate post). I did find a couple of charts that listed wire colors and locations but none of them answered this question.

The alarm uses the dome light for the door trigger and I need to know if the Max has a positive trigger or negative trigger. It what also be helpful to know the color and location of the wire I should tap into for this. I am sure I could figure it out by poking around with a multimeter, but it would save time and agravation if somebody could tell me or tell me where to find the information.

 

| ITEM | WIRE COLOR |POL| WIRE LOCATION |
| 12V|wht/red or wht/pur |+ |ignition harness |
| STARTER|blk/yel or blk/wht |+ |ignition harness |
| SECOND STARTER|grn/blk or red/blu |+ |ignition harness |
| IGNITION|blk/wht or blk/red |+ |ignition harness |
| SECOND IGNITION|red/yel or red |+ |ignition harness |
| ACCESSORY|blue or wht/blk |+ |ignition harness |
| POWER LOCK|lt. green/red |- |in drivers door at switch |
| POWER UNLOCK|green/yellow *1 |- |in drivers door at switch |
| LOCK MOTOR|brown/white | |in drivers door at switch |
| UNLOCK MOTOR|brown | |in drivers door at switch |
| DISARM DEFEAT|brown | |in passenger door at switch |
| PARKING LIGHTS +|red/green | |steering column |
| HEADLIGHTS|gry/yel(L)blu/blk(R)|+ |steering column |
| DOOR TRIGGER|red/white |- |low in drivers kick |
| TRUNK/HATCH PIN|purple/yellow |- |drivers kick or BCM *2 |
| HOOD PIN|yellow/black |- |BCM *2 |
|TRNK/HTCH RELEASE|purple/yellow |- |low drivers kick *3 |
| FCTRY ALARM ARM|arms w/ lock | | |
|FCTRY ALRM DISARM|disarms w/ unlock | | |
| DISARM NO UNLOCK|*4 | | |
| TACHOMETER|white/green | |ECM *5 |
| BRAKE WIRE|red/green |+ |at brake switch |
| HORN TRIGGER|green/white |- | |
| WIPERS|lt. green/red |- |steering column |
| LF WINDOW UP/DN|blu/red - blu/blk |A |in LF door at switch |
| RF WINDOW UP/DN|blu/red - blu/blk |A |in RF door at switch |
| LR WINDOW UP/DN|blu/red - blu/blk |A |in LR door at switch |
| RR WINDOW UP/DN|blu/red - blu/blk |A |in RR door at switch |


Notes:
Note: The ignition harness wires change color at a plug. The above listed colors show both sides of the plug.
*1 Requires a double pulse.
*2 The BCM (body control module) is located just below the radio.
*3 Must use a relay to interface with this circuit.
*4 A single negative pulse to the unlock wire will disarm without unlocking.
*5 The ECM is located in the front of the center console on the transmission hump. The wiring is easily reached by removing the small black panel just to the front of the center console on the passenger side. the wire is in the middle row, 7th one in from the left.

 

Wow, 5 minutes. Thanks I think that may answer part of my other question to. Does that little - mean it's a negative trigger?

 

yes..

(A - means alternating)

BTW - STAY AWAY FROM YELLOW WIRE LOOMS! - AIRBAGS

 

I want to know if factory alarm should be kept when instaling the aftermarket one. Alarm shop will do the work.