mars 22 removal

Hi, I'm a marine electrician , but not too knowledgeable on cars. I have a 03 Silverado with a Mars 22 that's become unreliable. I'd like to remove it. It appears by inspection and the diagrams,that I should be able to surgically clip each t splice, shrink the bare ends, and be back to scratch except for a gn/y wire approx 24ga that ties to a pink approx 14 ga . Am I correct in my assumption or is there a secret to doing this? Should I have the batteries disconnected for any reason other than the possibility of an accidental short while snipping?Or do they stay on? And last is there a precaution to avoid airbag deployment. Thanks in advance for any input. SteveSteve

Hi Steve,

Here is a link to the MARS 22 install manual :  MARS-22.pdf

The first thing to watch out for during the remote starter removal is a Starter Kill / AntiGrind relay circuit.  This is optional but might have been installed.  The truck starter wire is Yellow at the ignition switch and as long as it was not cut ( interrupted ) and the Mars thick Green Starter wire only connected to it, you should be OK.  If it was cut, then it must be properly reconnected as part of a complete de-install.

The other thing to watch for the the Passlock2 immobilizer bypass.  There are many ways to bypass the trucks Passlock2 system including a bypass module, a pair of relays & a resistor, or a more permanent solution.  Find the MARS 22 Orange (-) Output When Activated wire and see where that goes.  Some Passlock2 bypass modules cut ( interrupt ) the Yellow Passlock resistance wire and it must be reconnected after bypass removal.

You can do it hot.  Most professional installers never disconnect the battery during an install.  Just make sure you don't ground your cutters or a wire to chassis metal during removal.  As for the airbag,  be careful around and do not disconnect any yellow shielded wire harnesses.  These are usually found along the steering column and under the dash.

Soldering is fun!