P129F Chevy Cadillac and GMC fuel pump power control module 

Thank you very much for using basic tools . I find myself limited to these but hopefully soon a simple oscilloscope

Great diag, very thorough! Thanks for sharing!

Can't wait for the next video 👍 SHARP Dallas Auto Diag From Nick Ayivor from London England UK 🇬🇧 ⏰️ 07:44am Good Morning 🙏 🌄

Nice explanation

معدل ابو يزن

Very good

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When you talk about 3 phase motors I am thinking that you could measure ac voltage between any 2 of the phase wires and frequency would give an indication of the speed. My reference is from variable speed inverter drive motors that are used in residential air conditioners and industrial motors. Of course you would check the inputs to the module first. I saw phase 2 and 3 labeled on diagram. Is phase 1 connected to ground? Thanks for the Videos

After replacing the fuel module do I have to program it for it to start?

good info tks make good will no video tks

The blue and grey wire with the 2-3v ref What does it mean when I don’t have that voltage on either of those 2 wires

I changed mine and it’s still throwing the same code, not sure what to do