Grounding Aftermarket Alarm

[wiz561]

I'm going over my aftermarket alarm and remote starter installation and have a question about grounding. Almost everything I read says to not use factory ground locations. Well, I ended up grounding mine to a bolt in the drivers side kick panel that has other ground wires running to it.

Now part of me thinks it's OK because it's a good ground. But the other part of me thinks that for some reason, the remote starters/alarms don't want to share the ground. Should I look for something else?

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[phd12v]

i use pin #4 at the obd2 connector

[wiz561]

Originally Posted by phd12v

i use pin #4 at the obd2 connector

I don't know, but I think that the OBD2 connector ground isn't the best place. The reason I say this is because a long time ago, I had engine whine from a head unit and amp I installed. Moved it from a ground wire to a bolt and everything was fine.

But if it works....why mess with it.

[corlon]

your fine using a factory ground location for your remote start security system. your not really drawing any current for this application.

[phd12v]

Originally Posted by wiz561

I don't know, but I think that the OBD2 connector ground isn't the best place. The reason I say this is because a long time ago, I had engine whine from a head unit and amp I installed. Moved it from a ground wire to a bolt and everything was fine.

But if it works....why mess with it.

if your not familiar with pin 4 at the obd2, i can understand why you "think" that way

[Drew18WRX]

I always tap my own ground when doing a remote start/alarm. I dont like using factory ground points.

[phd12v]

https://i.stack.imgur.com/vJB6W.png


here is the standardized pinout