| [GMCnet] Water pump lights up when hitting monitor [message #305322] |
Fri, 12 August 2016 16:00  |
Olly Schmidt
Messages: 1265
Registered: February 2014
Location: Germany and Scottsville, ...
Karma: 8
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Senior Member |
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Hello,
when I switch on monitor on the system monitor panel, it lights up the
water pump switch. Does that give an indication as to where my current
non-functioning system monitor has an issue?
--
Best regards
Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA
'76a Eleganza II, VA
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Best regards
Olly Schmidt
PGP Key ID: 0x18a9 3a1f 4196 bf22
'76a Eleganza II, VA
'73 Sequoia, SH, Germany
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| Re: [GMCnet] Water pump lights up when hitting monitor [message #305324 is a reply to message #305322] |
Fri, 12 August 2016 16:41  |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Senior Member |
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Peer,
I would say your water pump light and the monitor display is sharing the same ground and that ground connection is poor.
When you turn on your monitor, the ground is poor and goes to 12Volts (or some voltage much higher than ground). The lamp ground is connected to the monitor ground and so it goes high too. This voltage then finds its way back through the lamp to the water pump motor and to an actual ground causing the water pump lamp to light up.
Find the ground point for these two grounds, clean it and everything should work!
Just my farmboy mechanic troubleshooting.
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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