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2003 chevy trailblazer_ls
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Discussion Starter · #1 ·
I removed an old Audiovox keyless entry system and installed a Audiovox Prestige Aps620n remote start/keyless entry system. I reused the old Passlock II bypass module for the locks, but didn't have wiring diagram for it, so I bought a cheap Bulldog Security remote start (RS) bypass from Checker auto parts.

At first I had a tach issue because the RS system would not learn the tach from PCM pin 49, so I used the blue/black wire leading into the harness on the top back portion of the engine. This change fixed my tach issue

The only thing I can do with the RS is start the car with the key, activate the RS, then pull the key out of the ignition and it will still run.

I'm using the following column wires:
12 volts- red/white( 40A)
Starter- Yellow
Ignition - Pink
2nd ignition- White
Accessory - Orange

Note: I'm not using a T-Harness, just tapping into wires directly.

I have checked for power at the starter relay under the hood and get it when the RS is trying to start the car. According to the Chilton's manual,
the ground pin of that relay comes from the PCM. I'm guessing I'm not making the PCM happy and therefore it does not provide the ground to short out the start relay.

Any help would be appreciated.

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