Maybe this could solve my electrical problems? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

406cid70Chevy · 10-26-2003, 07:49 PM

I found a wire that was hanging on only by a few strands, but I'm not sure what this wire is for. I know it hooks up with a red wire from the msd 6AL box and goes to the fuse box. Here are some pictures of what im talking about.

Anyone know what these wires do?

Thanks for your help guys.

cableguy0 · 10-26-2003, 07:59 PM

if that was my truck i would be looking for a new underhood harness because some electrical wizard in the past hacked yours all to he!! . that is scary wiring ready to cause a fire

406cid70Chevy · 10-26-2003, 08:03 PM

lol. That's because I've been going through pulling out all the wires checking them for bad spots.

But, yeah the mechanic I had put the msd and HEI in was a dumbass to say the least.

cableguy0 · 10-26-2003, 08:20 PM

obviously hes one of the "mechanics" if you want to call him that. thats makes me and other real mechanics look bad. but now i guess i should stop ranting and help ya lol. what are the two yellow wires doing besides trying to cause a fire? see where the white wire is connecting on the fuse box? he added that wire am i correct? if i were you i would connect the red wire directly to the white wire and get rid of the garbage thats there. when you make the connections solder them and use shrink tube for weatherproofing

406cid70Chevy · 10-26-2003, 08:30 PM

The yellow and white wires were original on the truck(i think), because they were soldered to the white. I don't know why the yellow wires were left on either, but I already took them off. The only wire he added was the red, which comes from the MSD box. I was looking for the MSD manual to find out what that red wire is for, but couldn't find it.

I don't know what that white braided wire does though, any guesses?

cableguy0 · 10-26-2003, 08:40 PM

the red wire should just be power to the box i went to msd's site and couldnt find a thing that was useful i put one in not long ago but cant remember what wire does what. if you have the manual use that diagram to wire it. its the simplest easiest most headache free way to do it. where is the braided white wire your talking about?

406cid70Chevy · 10-26-2003, 08:52 PM

The braided white wire in the first picture. It's the white wire that's connected to the two yellow wires. It's braided, but is sealed with rubber under the braiding.

68LSS1 · 10-26-2003, 08:59 PM

Small red wire goes to + side of coil. Small black to -- side of coil. Large red to battery +. Large black to battery --(or engine ground). Give me the specifics of your set up and I can tell you exactly (HEI or number of pins on module, etc).

cableguy0 · 10-26-2003, 09:00 PM

the only white wire i see in the original wiring diagram is brown and white i think he added that white wire to the fuse box

ddsmith · 10-26-2003, 09:07 PM

I believe that the white wire was the resistance wire for running juice to the coil originally. The yellow wire connected to the white braided wire originally came from the starter solenoid for starting the truck. It provided a full 12V for starting and then the resistance wire feed the coil with the truck running. These are of course just what I think and I don't give money back guarantees.

68LSS1 · 10-26-2003, 09:17 PM

If it's the white wire coming out of the MSD it is only used for Ford breaker points systems, TFI, most Chrysler and GM 5 pin module. It's for triggering. With a GM 4 pin module (what I'm assuming is used) the white wire is not used.

cdowns · 10-26-2003, 09:49 PM

i agree that that's the resistance wire, trace it back thru the harness to the firewall plug then use a pair of needle-nose pliers and pull it out and get rid of the wire and replace with a new wire at least14gaugeand solder and shrink-wrap

10-26-2003, 07:49 PM	#1
406cid70Chevy Registered User Join Date: Nov 2002 Posts: 43	Maybe this could solve my electrical problems? I found a wire that was hanging on only by a few strands, but I'm not sure what this wire is for. I know it hooks up with a red wire from the msd 6AL box and goes to the fuse box. Here are some pictures of what im talking about. Anyone know what these wires do? Thanks for your help guys.

10-26-2003, 07:59 PM	#2
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	if that was my truck i would be looking for a new underhood harness because some electrical wizard in the past hacked yours all to he!! . that is scary wiring ready to cause a fire __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-26-2003, 08:20 PM	#4
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	obviously hes one of the "mechanics" if you want to call him that. thats makes me and other real mechanics look bad. but now i guess i should stop ranting and help ya lol. what are the two yellow wires doing besides trying to cause a fire? see where the white wire is connecting on the fuse box? he added that wire am i correct? if i were you i would connect the red wire directly to the white wire and get rid of the garbage thats there. when you make the connections solder them and use shrink tube for weatherproofing __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-26-2003, 08:30 PM	#5
406cid70Chevy Registered User Join Date: Nov 2002 Posts: 43	The yellow and white wires were original on the truck(i think), because they were soldered to the white. I don't know why the yellow wires were left on either, but I already took them off. The only wire he added was the red, which comes from the MSD box. I was looking for the MSD manual to find out what that red wire is for, but couldn't find it. I don't know what that white braided wire does though, any guesses? Last edited by 406cid70Chevy; 10-26-2003 at 08:34 PM.

10-26-2003, 08:40 PM	#6
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	the red wire should just be power to the box i went to msd's site and couldnt find a thing that was useful i put one in not long ago but cant remember what wire does what. if you have the manual use that diagram to wire it. its the simplest easiest most headache free way to do it. where is the braided white wire your talking about? __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-26-2003, 08:03 PM	#3
406cid70Chevy Registered User Join Date: Nov 2002 Posts: 43	lol. That's because I've been going through pulling out all the wires checking them for bad spots. But, yeah the mechanic I had put the msd and HEI in was a dumbass to say the least.

10-26-2003, 08:52 PM	#7
406cid70Chevy Registered User Join Date: Nov 2002 Posts: 43	The braided white wire in the first picture. It's the white wire that's connected to the two yellow wires. It's braided, but is sealed with rubber under the braiding.

10-26-2003, 08:59 PM	#8
68LSS1 Registered User Join Date: Dec 2002 Location: Tampa Posts: 1,191	Small red wire goes to + side of coil. Small black to -- side of coil. Large red to battery +. Large black to battery --(or engine ground). Give me the specifics of your set up and I can tell you exactly (HEI or number of pins on module, etc). __________________ '68 Short Step LS1/T56, Hydratech, Fatman Fabrications Stage III, Baer, Hot Rods to Hell, US Body, S&W, etc

10-26-2003, 09:00 PM	#9
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	the only white wire i see in the original wiring diagram is brown and white i think he added that white wire to the fuse box __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-26-2003, 09:07 PM	#10
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	I believe that the white wire was the resistance wire for running juice to the coil originally. The yellow wire connected to the white braided wire originally came from the starter solenoid for starting the truck. It provided a full 12V for starting and then the resistance wire feed the coil with the truck running. These are of course just what I think and I don't give money back guarantees. __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

10-26-2003, 09:17 PM	#11
68LSS1 Registered User Join Date: Dec 2002 Location: Tampa Posts: 1,191	If it's the white wire coming out of the MSD it is only used for Ford breaker points systems, TFI, most Chrysler and GM 5 pin module. It's for triggering. With a GM 4 pin module (what I'm assuming is used) the white wire is not used. __________________ '68 Short Step LS1/T56, Hydratech, Fatman Fabrications Stage III, Baer, Hot Rods to Hell, US Body, S&W, etc

10-26-2003, 09:49 PM	#12
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	i agree that that's the resistance wire, trace it back thru the harness to the firewall plug then use a pair of needle-nose pliers and pull it out and get rid of the wire and replace with a new wire at least14gaugeand solder and shrink-wrap __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

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