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02-26-2022, 01:58 PM
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#1 |
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Senior Moment
 
Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,168
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HELP. 1Wire to solenoid , what color
My Sons Truck only has 1 terminal at the solenoid plus the bat cable. What color wire goes to the solenoid Yellow or Purple???
The only thing I know about electricity is , You can’t see it and It Will Kill You, so I Don’t play with it
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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02-26-2022, 02:15 PM
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#2 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,606
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Re: HELP. 1Wire to solenoid , what color
Purple wire goes to the "S" terminal. The yellow wire provides ignition power during cranking. If he has electronic ignition, the yellow wire is vestigial.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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02-26-2022, 02:52 PM
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#3 |
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Senior Moment
Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,168
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Re: HELP. 1Wire to solenoid , what color
vestigial ???? Yes he has HEI
__________________
1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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02-26-2022, 03:22 PM
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#4 | |
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The Older Generation
  
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,648
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Re: HELP. 1Wire to solenoid , what color
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Quote:
That's what I said too...??.. I'm too lazy to look it up..  The yellow wire is not needed if he has the HEI. Purple wire goes to the small terminal. ("S" for solenoid) LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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02-26-2022, 06:35 PM
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#5 |
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Registered User
Join Date: Apr 2010
Location: So Cal
Posts: 1,459
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Re: HELP. 1Wire to solenoid , what color
It isn't an issue of not being used with an HEI ignition. It is more of a matter that it should not be used with an HEI.
The "R" terminal (sometimes labeled as "I" terminal) connects to a little bent copper finger inside the solenoid cap. The finger should contact the solenoid Disc, only when the solenoid is energized. The solenoid contains two coils. A Hold-in winding and a Pull-in winding and both generate a large magnetic field when energized. When the 12v is removed from the "S" terminal, the magnetic field collapses and a very high EMF, voltage spike is generated across the coils. If the solenoid disc flops the wrong way and/or the copper finger is bent incorrectly, that High voltage spike can travel up that yellow wire and fry the HEI module. With the old points ignition, a high voltage spike from the solenoid, applied to the ignition coil would go completely unnoticed. It's busy generating its own voltage spike.
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'67 GMC 2500, 292, 4spd, AC |
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02-26-2022, 11:48 PM
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#6 |
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Senior Moment
Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,168
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Re: HELP. 1Wire to solenoid , what color
It was the Purple wire. The reason we didn’t have power to it was that it runs through the neutral safety switch. We had changed the column to standard from Auto (going with 4 speed) so the NSS needed to be jumped. Problem solved
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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02-27-2022, 06:06 PM
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#7 |
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Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,814
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Re: HELP. 1Wire to solenoid , what color
So now the neutral safety switch is vestigial!
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02-27-2022, 08:08 PM
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#8 | |
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Senior Moment
Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,168
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Re: HELP. 1Wire to solenoid , what color
Quote:
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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02-28-2022, 09:32 AM
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#9 |
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Proprietor of Dale's Corner
Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,243
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Re: HELP. 1Wire to solenoid , what color
I look it up, weird word but it fits ....
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man R.I.P. FleetsidePaul |
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