Alright so I get down to trying to completely remove this alarm system from my '87 5.0 We have been trying to get the car to start at all since I've owned (installed new timing chain, plugs, wires, etc. other thread) and my buddy told me that he was pretty sure the non-starting issue had nothing to do with the alarm but it's gonna bug the **** outta me until it's completely gone. Only problem is, I dont know how to get the whole thing taken care of, I've manage to kill the big ass bullhorn under the hood but I still need to ditch all the wiring on car. The previous owner said it was a factory alarm but it's doesnt look factory to me, and I didnt even know they put alarms on these cars back that far. I got some pictures so some of the gurus here might be able to verify that this crap is indeed aftermarket. It's crazy the thing keeps automaticalyl arming itself whether I want it to or not. Drives me up the wall. Where do I start exactly, without removing wiring or fuses that I should not be goofing with?
Permanently Removing Alarm
- Thread starter shlby123
- Start date
Have you located the brain yet? You will want to trace the several main harnesses down and disconnect and refurbish the OEM wirings, one wire at a time.
The two main spots you can run into issues are:
with the starter circuit (depending upon how the relay was wired). If it's passive, the car will start after the alarm is removed. I'd remove the relay and restore the wiring for resistivity concerns however. If the relay is active, you simply need to reconnect the common and Normally Open Terminal wires.
The locks are the other spot that need to be rejoined. Once again, if external relays were used, they can be left in place (nice for future keyless or alarm installs). Otherwise, the Common and Normally Closed terminal wires are reunited after the relays are removed.
It sounds like your alarm arms passively. Annoying, huh.
Good luck.
The two main spots you can run into issues are:
with the starter circuit (depending upon how the relay was wired). If it's passive, the car will start after the alarm is removed. I'd remove the relay and restore the wiring for resistivity concerns however. If the relay is active, you simply need to reconnect the common and Normally Open Terminal wires.
The locks are the other spot that need to be rejoined. Once again, if external relays were used, they can be left in place (nice for future keyless or alarm installs). Otherwise, the Common and Normally Closed terminal wires are reunited after the relays are removed.
It sounds like your alarm arms passively. Annoying, huh.
Good luck.
rpm182000
New Member
My alarm on my car did the same thing. It had a mind of its own. My cousin and I unhooked the box under the dash. Not sure what its called maybe some of the others on here might know. And after that my alarm didn't work anymore.
5.0 Nostalgia
10 Year Member
When car alarms get old, they really can start to suck. My dad has several problems with the alarm in his 91 GT. With help from HISSIN50, I disconnected and removed most of it. As said, you have to find the brain first. His was under the dash near the steering wheel. Once you have that disconnected and pulled out, you can start pulling everything else out without worrying about screwing anything up. This was a Viper alarm. The brain looked like a little black box and was about half the size of a cigar box.
It came be a fairly big project to get all the wiring out. I just pulled everything out under the dash and in the engine bay and left everything for the doors and going back to the trunk. It was all under the carpet and doesn't show.
It came be a fairly big project to get all the wiring out. I just pulled everything out under the dash and in the engine bay and left everything for the doors and going back to the trunk. It was all under the carpet and doesn't show.
Similar threads
