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Re: [GMCnet] Poor Mileage solved [message #324617 is a reply to message #324615]

Wed, 04 October 2017 20:51

RF_Burns

Messages: 2276
Registered: June 2008
Location: S. Ontario, Canada

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Senior Member

Ken,
I'm thinking the module may have a built-in reversed biased diode in parallel with its output switching transistor. It would be needed for the same reason a diode is put across a relay coil powered by any electronic device... to protect the output transistor from the reverse EMF as the coil field collapses.

I would certainly remove it as I'm sure GM Engineers already installed the needed protection. If it failed shorted, it would certainly take out several modules before it was found.

Just my electronic technician and farmboy mechanic opinion.

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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[Message index]

		[GMCnet] Poor Mileage solved By: emerystora on Wed, 04 October 2017 19:56
		Re: [GMCnet] Poor Mileage solved By: Ken Henderson on Wed, 04 October 2017 20:25
		Re: [GMCnet] Poor Mileage solved By: RF_Burns on Wed, 04 October 2017 20:51
		Re: [GMCnet] Poor Mileage solved By: Ken Henderson on Wed, 04 October 2017 22:39
		Re: [GMCnet] Poor Mileage solved By: Billy Massey on Thu, 05 October 2017 08:21

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