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Here is the firing order and spark plug wire routing diagram for a 2006 Chevy Impala LT 3.9 V6:
Firing order: 1-2-3-4-5-6
Spark plug wire routing (starting from the driver's side):
Cylinder 1: connect to the coil tower closest to the driver's side headlight
Cylinder 3: connect to the coil tower next to cylinder 1
Cylinder 5: connect to the coil tower next to cylinder 3
Cylinder 2: connect to the coil tower closest to the passenger side headlight
Cylinder 4: connect to the coil tower next to cylinder 2
Cylinder 6: connect to the coil tower next to cylinder 4
Note: Make sure to route the wires properly to avoid cross-firing.
Did you do a good visual inspection of the headlight area for anything obvious? Perhaps the crash jacked up your wiring. If you had to jimmy the switch to get high beams to work, that tells me the switch could be the problem. Take a look at a wiring diagram and do some basic troubleshooting if you have a multimeter. Here is a link with a couple of diagrams and suggestions that were given to another person with this problem.
If the relay were the problem both sides wouldn't work . Do you know how to do automotive electrical testing ? How to read a wiring diagram ? You can view wiring diagrams here http://www.bbbind.com/free_tsb.html Enter your vehicle info. year , make , model , engine size . Then under system click on lighting , then subsystem click headlamps . Click on the search button , then on the blue links one at a time . At the top of the first diagram you will see the fuse's for low an high beams . The fuse's send B+ voltage directly to the high an low beams , from there B+ voltage goes on to the dimmer switch shown on the next diagram .Low beam headlamps from the dimmer swich goes through the headlamp relay when energized by the BCM . When the relay is energized that compleats the circuit to ground at G- 201 . So you see if one side is working it can't be the relay . Doing electrical testing , voltage drop testing is the way to find the problem . Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia Electric Testing Techniques You Need to Know
I have a 2000 impala. Today I just had to buy a $115 wire harness just to hook up my deck and speakers. It's because there's two pieces instead of one to connect to the harness. It's because when u turn your key off ,your radio plays until you open the door. The harness comes with a fan type thing ,that keeps everything from dying.hope this helps
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