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[GMCnet] What's the main cause of the low coolent system not working? [message #338476]

Wed, 07 November 2018 09:56

BobDunahugh

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Registered: October 2010
Location: Cedar Rapids, IA

Karma: 11

Senior Member

It's a piece of aluminum that contacts the coolent. A light bulb. Wire. Then that little circuit board. Anyone knowledgeable on that board. Bob Dunahugh
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Re: [GMCnet] What's the main cause of the low coolent system not working? [message #338477 is a reply to message #338476]

Wed, 07 November 2018 10:50

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma: 3

Senior Member

Bob,
Somewhere I believe I've seen the schematic for the coolant circuit board. I looked this morning, but haven't found it.

If the light bulb is working and there is power and ground to the board, that only only leaves fixing or replacing the board.

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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Re: [GMCnet] What's the main cause of the low coolent system not working? [message #338479 is a reply to message #338476]

Wed, 07 November 2018 11:12

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma: 3

Senior Member

Bob,
I found the schematic of a three-wire coolant circuit board. I think there is also a 4 wire version. If yours is a 3 wire, it may be simple to fix if faulty.

http://www.gmcmhphotos.com/photos/low-coolant-module/p58512-low-coolant-module-schematic.html

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