can you identify this wire for me - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jeremy_5 · 08-03-2004, 06:44 PM

I will try to describe this the best I can, I know a picture would help and if I can get ahold of a digital camera I will go snap one. Anyways, on the heater control there is a yellow half round looking thing, there is two yellow wires running into it. What is this? I am trying to hook up my A.M. radio and the someone did a hack job on the wires, it looks like the wire that runs out of the fuse box labeled "radio" runs to that yellow thing and then is spliced and I think it ran to the old radio. Any help would be appreciated.

WRMZ71 · 08-03-2004, 09:11 PM

Is it an AC truck? and are you talking about the heater control switches? somebody might know what you're talking about but I need a little more info I guess.

Jeremy_5 · 08-03-2004, 09:40 PM

It's a non AC truck, and yes I am talking about the heater control switches but it can only be seen if you take out the control switches and let it hang down, it is not actually on the panel of control switches. I am sure this is not the best explanation so I will get ahold of a digital camera so I can take a picture of it.

68C15 · 08-03-2004, 10:34 PM

is it powerd with the dash lights? I will have to look at my wiring diagram. not sure if it is same as a '68.

Jeremy_5 · 08-04-2004, 01:41 AM

Thanks 68C15, I would look at my wiring diagram but I cannot figure those stupid things out, it is like I am looking at a foreign language, I don't know how you guys read those things.

No it doesn't look to be powered by dash lights, got the camera pic will be posted tomorrow.

JimKshortstep4x4 · 08-04-2004, 08:50 AM

It sounds like someone ran a wire from the radio terminal on the fuse panel to the heater control and then fed the radio off of a junction.

The factory radio wiring was a red wire and it fed the radio separately. The heater control was fed with a fairly large brown wire, (10 gage?).

The heater blower needs a large wire and I would suggest getting another harness or refeed the heater switch with a separate feed.

Jim

Jeremy_5 · 09-02-2004, 03:20 AM

here is the picture...

BobbyK · 09-02-2004, 04:46 AM

Dude that's some kind of transformer.
That is a PO addition.Definitly not a stock item.
Whats it connected to?

I also see what might be a resistor(blue tube thing).It might be a power supply to a 6V radio?Stepping down the voltage from 12V to 6V.
If you have a meter measure the output voltage.

**JIMs70GMC** · 09-02-2004, 06:52 AM

I bet it's something added by PO to filter out alternator noise in the radio. The blue thing is a capacitor, that and the transformer(coil) would be a filter.

Old Dave · 09-02-2004, 07:32 AM

JIMS70GMC is correct it's a LC (inductor-capacitor) to help filter out alternator whine and probably whine from the blower motor. Remove it, and while you're at it take out out all those crimp wire nuts as they are a source of problems. Solder the wires back together and use heat shrink tubing on your connections and you won't have any problems.

Davy · 09-02-2004, 11:26 AM

Sweet VIKINGS key chain!

Jeremy_5 · 09-02-2004, 03:27 PM

thanks for all the replies guys!!! So can I just remove the yellow thing altogether? It looked factory to me, shows what I know

Davy, Ya go VIKINGS!!! They are going to pretty good this year!

mhicks · 09-02-2004, 03:39 PM

If you remove it and your stereo start making a wining noise through the speakers then hook it back up. It is a noise filter.

Jeremy_5 · 09-02-2004, 03:47 PM

gotcha, thanks

08-03-2004, 06:44 PM	#1
Jeremy_5 Truck addict Join Date: Sep 2003 Location: Lincoln, California Posts: 497	can you identify this wire for me I will try to describe this the best I can, I know a picture would help and if I can get ahold of a digital camera I will go snap one. Anyways, on the heater control there is a yellow half round looking thing, there is two yellow wires running into it. What is this? I am trying to hook up my A.M. radio and the someone did a hack job on the wires, it looks like the wire that runs out of the fuse box labeled "radio" runs to that yellow thing and then is spliced and I think it ran to the old radio. Any help would be appreciated. __________________ 1956 Chevy Napco 1972 Cheyenne Super 1970 K20

08-03-2004, 09:40 PM	#3
Jeremy_5 Truck addict Join Date: Sep 2003 Location: Lincoln, California Posts: 497	It's a non AC truck, and yes I am talking about the heater control switches but it can only be seen if you take out the control switches and let it hang down, it is not actually on the panel of control switches. I am sure this is not the best explanation so I will get ahold of a digital camera so I can take a picture of it. __________________ 1956 Chevy Napco 1972 Cheyenne Super 1970 K20

08-03-2004, 10:34 PM	#4
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	is it powerd with the dash lights? I will have to look at my wiring diagram. not sure if it is same as a '68. __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

08-04-2004, 01:41 AM	#5
Jeremy_5 Truck addict Join Date: Sep 2003 Location: Lincoln, California Posts: 497	Thanks 68C15, I would look at my wiring diagram but I cannot figure those stupid things out, it is like I am looking at a foreign language, I don't know how you guys read those things. No it doesn't look to be powered by dash lights, got the camera pic will be posted tomorrow. __________________ 1956 Chevy Napco 1972 Cheyenne Super 1970 K20 Last edited by Jeremy_5; 08-04-2004 at 01:41 AM. Reason: can't spell

09-02-2004, 03:20 AM	#7
Jeremy_5 Truck addict Join Date: Sep 2003 Location: Lincoln, California Posts: 497	here is the picture... Attached Images __________________ 1956 Chevy Napco 1972 Cheyenne Super 1970 K20

08-03-2004, 09:11 PM	#2
WRMZ71 Cause the Chicks DIG IT!! Join Date: Nov 2003 Location: Beaufort SC Posts: 509	Is it an AC truck? and are you talking about the heater control switches? somebody might know what you're talking about but I need a little more info I guess.

08-04-2004, 08:50 AM	#6
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	It sounds like someone ran a wire from the radio terminal on the fuse panel to the heater control and then fed the radio off of a junction. The factory radio wiring was a red wire and it fed the radio separately. The heater control was fed with a fairly large brown wire, (10 gage?). The heater blower needs a large wire and I would suggest getting another harness or refeed the heater switch with a separate feed. Jim

09-02-2004, 04:46 AM	#8
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,771	Dude that's some kind of transformer. That is a PO addition.Definitly not a stock item. Whats it connected to? I also see what might be a resistor(blue tube thing).It might be a power supply to a 6V radio?Stepping down the voltage from 12V to 6V. If you have a meter measure the output voltage. __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE Last edited by BobbyK; 09-02-2004 at 04:49 AM.

09-02-2004, 06:52 AM	#9
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	I bet it's something added by PO to filter out alternator noise in the radio. The blue thing is a capacitor, that and the transformer(coil) would be a filter. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

09-02-2004, 07:32 AM	#10
Old Dave Is a bullfrog waterproof? Join Date: Nov 2000 Location: OLATHE, KANSAS Posts: 1,130	JIMS70GMC is correct it's a LC (inductor-capacitor) to help filter out alternator whine and probably whine from the blower motor. Remove it, and while you're at it take out out all those crimp wire nuts as they are a source of problems. Solder the wires back together and use heat shrink tubing on your connections and you won't have any problems. __________________ "It is better to remain silent and be thought a fool, than to open one's mouth and remove all doubt." Ben Franklin __________________ 1970 Chevy shortbed 2002 Harley Custom Chopper (Long sucker) 1998 K2500 5.7L 5-speed Longbed 1st two are My son's toys...they just live in my garage! 1997 GMC K1500 Suburban 1993 S-10 Blazer 4D (youngest son's daily driver) 2000 Dodge Ram 4WD Ext. Cab (5.9L) Wife is a late year 1951

09-02-2004, 11:26 AM	#11
Davy Registered User Join Date: Apr 2003 Location: Rice, Minnesota Posts: 370	Sweet VIKINGS key chain! __________________ 1970 Blazer CST Looking for NOS items for my CST restoration.

09-02-2004, 03:27 PM	#12
Jeremy_5 Truck addict Join Date: Sep 2003 Location: Lincoln, California Posts: 497	thanks for all the replies guys!!! So can I just remove the yellow thing altogether? It looked factory to me, shows what I know Davy, Ya go VIKINGS!!! They are going to pretty good this year! __________________ 1956 Chevy Napco 1972 Cheyenne Super 1970 K20

09-02-2004, 03:39 PM	#13
mhicks Registered User Join Date: Jan 2004 Location: Weatherford,Tx Posts: 747	If you remove it and your stereo start making a wining noise through the speakers then hook it back up. It is a noise filter.

09-02-2004, 03:47 PM	#14
Jeremy_5 Truck addict Join Date: Sep 2003 Location: Lincoln, California Posts: 497	gotcha, thanks __________________ 1956 Chevy Napco 1972 Cheyenne Super 1970 K20



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