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ECM relay buzzing - engine won’t start

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ECM relay buzzing - engine won’t start

 
Old 03-14-2019, 03:19 PM
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KemahGT
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Default ECM relay buzzing - engine won’t start

Hey guys and gals, just finished a build requiring an engine removal and replacement using Fyreants how to. I went to get my stock tune off the car and heard a buzzing. Thought it was fuel pump at first and discovered it was actually the ECM relay at position #62 on my 2016 main fuse block. Tried to start it, same buzzing with no starter engagement.

Voltage is good at over 12.5. Disconnected the 2 power cables at the fuse block, removed and checked for damaged or misaligned pins, and then reinstalled. Same problem. HPTuners of course can’t read the stock tune.

The dash fires up. Lights and door locks work. Radio works. OnStar even sent me an email when I powered it all up.

I’m at a loss. Any ideas?

Last edited by KemahGT; 03-14-2019 at 03:20 PM.
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Old 03-14-2019, 04:03 PM
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KemahGT
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Default Solved!

I swear these cars have more redundant grounds than a 737 Max 8!

Left ground off at drivers lower front of block! Damnit!

Back to work on this thing......
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Old 03-15-2019, 02:54 AM
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Oh4GTO
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Originally Posted by KemahGT View Post
I swear these cars have more redundant grounds than a 737 Max 8!

Left ground off at drivers lower front of block! Damnit!

Back to work on this thing......
Too soon my friend.
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