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Fog diode mod causing BCM SHORT and no warranty coverage

adam.busch
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tbarn Senior Enthusiast

tbarn

Posted
Posted

 

 

Yes, that notation will be with you forever.

Unless it was a completed Warranty repair, it won't be available to any other dealer. Our store has no way of knowing what some other shop has done to a vehicle except to look warranty repair history.

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Britt Lifsey
Britt Lifsey

And people here complain that the dealers are lying, thieving, good for nothing jerks...

Thomcat
Thomcat

Could be used as a reason to void all ECM networked electrical system and vehicle accessories containing solid state components.   All electrical systems switching/monitoring are controlled by the E

CounterMeasure
CounterMeasure

As a software developer and electrical engineer, in layman's terms, a IC doesn't have to let the magic smoke out in order to fail. I've seen countless MCUs and other ICs act wonky due to internal shor

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20Denali22 Senior Enthusiast

20Denali22

Posted
Posted (edited)

I took out my diode after reading this post and the potential for other issues. I'm about to run out on my 3 year 36k b2b so I'm just playing it safe

Edited by 20Bowtie14
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Thomcat Senior Enthusiast

Thomcat

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Posted (edited)

Unless it was a completed Warranty repair, it won't be available to any other dealer. Our store has no way of knowing what some other shop has done to a vehicle except to look warranty repair history.

If the vehicle was submitted, examined, evaluated and denied as a warranty repair it should still be in the system as part of the warranty repair history - if for nothing else so the dealer can get reimbursed by GM for the amount of time expended.

 

There's no longer a choice for self or independent repair. Since the new BCM must be reprogrammed to make it play nice with the rest of the modules on the vehicle's network, it has to go to some Chevy dealer for repair. Might try another dealer on the chance the invalidation of the warranty was not in the system.

Edited by Thomcat
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JoshC97 New Member

JoshC97

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Posted

For this mod to be done safely you really need to use two diodes. One like all the instructions say and a second one between where the diode connects to the fog relay trigger wire and the BCM to keep power from back feeding into the BCM when the high beams are feeding it power. I bought a X5 (brown) BCM jumper so I wouldn't affect the factory wiring that if I ever had a problem I could remove it from the system without leaving any evidence behind. 

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