Wiring To Coil Packs

[jiminycricket]

Hey guys,

My question is this. Where can i find the 12v positive wire that feeds power to each individual coil pak for the spark plugs. Its a 4.8L on a 99 sierra. i know there are 4 different wires going to each pak. Each on has a red and black for positive and ground but the other two im not to sure about. So im assuming that the eight red wires eventually join togehter somewhere and go to a fuse in the underhood fuse pannel. Any help would be greatly appreciated.

 

Thanks

james

[jro909]

try the dealer or a parts store, i can't imagine they are too rare of wire...why do you need the wires?

[jiminycricket]

try the dealer or a parts store, i can't imagine they are too rare of wire...why do you need the wires?

 

 

I need to put the wire feeding power to the spark plugs. I need it to hook it uo to a momentary switch so when i hit the switch, it cuts power to the engine and puts the power to another source. Dealer will probably charge me way to much for something that is probably simple. I just want to know where this wire branches off to feed the coil paks.

[thearborbarber]

All right you peaked my interest enough to go to the garage for my shop manual. I am not exactly sure what you are looking for but here goes.

 

On the 4 wire connector that plugs into the coil, looking at the plug with the tub up and from left to right the pins are;

 

1. 12 volt supply

2. Ignition control from pcm

3. Reference Low

4. Ground

 

According to wiring diagram all the 12 volt supplies are tied together and the wire should be pink.

 

So what's the other source you want to run power too.

[jiminycricket]

All right you peaked my interest enough to go to the garage for my shop manual. I am not exactly sure what you are looking for but here goes.

 

On the 4 wire connector that plugs into the coil, looking at the plug with the tub up and from left to right the pins are;

 

1. 12 volt supply

2. Ignition control from pcm

3. Reference Low

4. Ground

 

According to wiring diagram all the 12 volt supplies are tied together and the wire should be pink.

 

So what's the other source you want to run power too.

 

 

Thanks for that man. I found the pink wires but there are two. One frome the left side of the motor to that set of plugs and another from the right side plugs. I believe they are there own seperate wire going to the fuse bux under the hood compartment. Fuses IGN A and IGN B. These fuses are listed as ignition switch and the other fuses have other names ontop like ignition switch, fuel injector, etc. I bought a kit that cuts power to the spark plugs so more fuel goes into the exhaust for a flamethrower. So i have to run the 12v wire to my switch and the other end to the switch so when i push the button it puts the power to another source. so im unsure if the wires join together around the steering column or before the fuse box then split to become two seperate wires for each bank of the plugs.

 

Thanks

James

[thearborbarber]

It shows 2 circuits on the wiring diagram. Get a double pole switch then you can run both circuits on the switch but still keep them isolated from each other.