Quick wire color questions... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tony_SS · 02-15-2009, 11:31 PM

I have a light blue wire coming thru the firewall all by iteself.. it leads to nowhere under the hood.. anyone know what its for?

And I have a white wire and a black wire seemed together that goes from behind the fuse panel back to the right rear speaker area then its unplugged.. any ideas there too? * cargo lamps do work inside and out.

Thanks!

James McClure · 02-16-2009, 12:28 AM

Tony. I don't have a clue about the blue wire you speak of. How does it pass thru the fire wall? Does it look factory? The black\white wires may go to the seat belt retractor. I have an 84 that has wires going to the left retractor only, jim

Tony_SS · 02-16-2009, 12:35 AM

The light blue pass thru the firewall in a black grommet... its def factory. My truck only has 90k on it and it's untouched under there...

James McClure · 02-16-2009, 09:13 AM

I only have the manual for 84 and mine don't have a blue wire and it don't show up in the schematics for 84. You might get lucky and find an 86 manual or a dealer mechanic who knows. Sorry I can't be of more help, jim

Tony_SS · 02-16-2009, 09:17 AM

Thanks anyway Jim.. I will post a pic or 2 and maybe someone else can identify it.. its a light blue one.. seems strange that it gets a dedicated spot thru the firewall.

heavychevy79 · 02-17-2009, 01:16 AM

What year truck?
Where does the blue wire go to on the inside of the cab?
Where does it stop?

silvereagle07 · 02-17-2009, 08:26 AM

I'm looking at the 86 wiring diagram in the Chilton manual and the only two blue wires go to the electric choke heater and the right front directional light. There is a blue wire from the ECM to the throttle position switch (with a gray and black wire in a connector). Hope this helps.

02-15-2009, 11:31 PM	#1
Tony_SS Registered User Join Date: Dec 2008 Location: Washington, MO Posts: 643	Quick wire color questions... I have a light blue wire coming thru the firewall all by iteself.. it leads to nowhere under the hood.. anyone know what its for? And I have a white wire and a black wire seemed together that goes from behind the fuse panel back to the right rear speaker area then its unplugged.. any ideas there too? * cargo lamps do work inside and out. Thanks!

02-16-2009, 12:28 AM	#2
James McClure One shot, one kill. Join Date: Dec 2007 Location: Saratoga Springs NY Posts: 859	Re: Quick wire color questions... Tony. I don't have a clue about the blue wire you speak of. How does it pass thru the fire wall? Does it look factory? The black\white wires may go to the seat belt retractor. I have an 84 that has wires going to the left retractor only, jim __________________ 1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.

02-16-2009, 12:35 AM	#3
Tony_SS Registered User Join Date: Dec 2008 Location: Washington, MO Posts: 643	Re: Quick wire color questions... The light blue pass thru the firewall in a black grommet... its def factory. My truck only has 90k on it and it's untouched under there...

02-16-2009, 09:13 AM	#4
James McClure One shot, one kill. Join Date: Dec 2007 Location: Saratoga Springs NY Posts: 859	Re: Quick wire color questions... I only have the manual for 84 and mine don't have a blue wire and it don't show up in the schematics for 84. You might get lucky and find an 86 manual or a dealer mechanic who knows. Sorry I can't be of more help, jim __________________ 1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.

02-16-2009, 09:17 AM	#5
Tony_SS Registered User Join Date: Dec 2008 Location: Washington, MO Posts: 643	Re: Quick wire color questions... Thanks anyway Jim.. I will post a pic or 2 and maybe someone else can identify it.. its a light blue one.. seems strange that it gets a dedicated spot thru the firewall.

02-17-2009, 01:16 AM	#6
heavychevy79 Cheyenne Super Join Date: Nov 2008 Location: Dallas Texas Posts: 545	Re: Quick wire color questions... What year truck? Where does the blue wire go to on the inside of the cab? Where does it stop?

02-17-2009, 08:26 AM	#7
silvereagle07 Registered User Join Date: Sep 2008 Location: Bailey, NC Posts: 2,462	Re: Quick wire color questions... I'm looking at the 86 wiring diagram in the Chilton manual and the only two blue wires go to the electric choke heater and the right front directional light. There is a blue wire from the ECM to the throttle position switch (with a gray and black wire in a connector). Hope this helps. __________________ Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT Last edited by silvereagle07; 02-17-2009 at 08:29 AM. Reason: wiring

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