No high beams, no turn signals

[M5XTu]

03 530. I have no turn signals and no high beams. I replaced the switch/stalk but still the same. I ran INPA and it has no LCM stored codes. I ran INPA on GM and it gave all kinds of codes.

I was able to turn on high beams and turn signals via INPA activate feature. I am thinking if the LCM is truly bad (cold solder, broken circuit or burnt chip), the high beams and turn signals will not turn on at all.

Any input?


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[JimLev]

Have you tried to clear those codes? Then see what comes back.
If INPA will turn on the lights it must be an input problem.
Is this the original LCM or has it been changed?

[M5XTu]

Have you tried to clear those codes? Then see what comes back.
If INPA will turn on the lights it must be an input problem.
Is this the original LCM or has it been changed?

I cleared the codes and the problem persists. AFAIK, it's the original LKM.


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[M5XTu]

Got another LKM. Coded it to the car using PA Soft. All is good now.


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[HoZy]

Got another LKM. Coded it to the car using PA Soft. All is good now.


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PA Soft won't carry over all of your vehicles programming using the ZCS information(Unless the donor vehicle was identically optioned & the same build date range for your model), that'll be a job for WinKFP.

But glad you did track your issue down to a faulty LCM.

Cheers
Mat

[M5XTu]

Everything transferred over, actually. I just copied all options from bad lcm to donor lcm.


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[HoZy]

That's not how it works.

Cheers

[M5XTu]

Tell us. How does it work your way when all I had to do was copy all info from old lcm to donor lcm, including VIN and mileage?


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