What wires to connect for all of the external lights to function properly?

MYLINDA ASHWORTH BEASLEY

MEMBER
2004 CHEVROLET MALIBU
3.6L
6 CYL
2WD
AUTOMATIC
160,000 MILES

I have the car listed above LT, Z model that has had electrical problems since I purchased it almost 5 years ago. The previous owner had cut the original wire harness and installed pigtails to put in aftermarket projector halo headlights. The pigtails were not the same color wires as the original wires. They have since burned out. Leaving me with original wire harness all wires cut. I removed headlights and tidied up all wires (some were about 2ft. Long) and now I need to know what wires to connect for all my external lights to function properly. And then I will move on to the rest of the wiring like the driver's seat is not connected it's not original. The trunk has a short to ground and the 3rd brake light is gone. I can't afford to hire someone, so I've tried to do most repairs myself. All the diagrams I've found seem to have different colored wires than the car. If anyone could help with information it would be greatly appreciated. I live 8 miles from the nearest store, so I need transportation. I'm ready to use it for target practice at this point. Lol

9 Replies

JACOBANDNICKOLAS

MECHANIC
109,705 POSTS

Hi,

Don't use it for target practice. LOL As far as the headlamps are concerned, I attached the wiring schematic for the headlamp circuit.

Let me know what is happening and I'll do my best to help.

Take care,

Joe

See pics below. Note: The schematic was one page. I had to cut it in half to make it readable for you. I did overlap the two so you can follow from one to the next. Check out the images (below). Let us know how it goes

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Sunday, February 4th, 2024 AT 7:28 PM

MYLINDA ASHWORTH BEASLEY

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Thank you so much. I will attempt this after work since it is warm enough today and I will let you know how it goes. Thank you again

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Monday, February 5th, 2024 AT 2:01 PM

JACOBANDNICKOLAS

MECHANIC
109,705 POSTS

Mylinda,

No problem whatsoever. Let me know what you find, and I'll do my best to help from my end.

Take care,

Joe

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Monday, February 5th, 2024 AT 6:18 PM

MYLINDA ASHWORTH BEASLEY

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I attempted to follow the chart you sent. Unfortunately, it did not work for me. Could you dumb it down a bit for me? The signal lights are working now but the others have me frustrated. Possibly tell me what color goes to high, Low etc. My multimeter is broken. I know it's a lot to ask but my hands are tied.

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Wednesday, February 7th, 2024 AT 3:22 AM

JACOBANDNICKOLAS

MECHANIC
109,705 POSTS

Hi,

No problem. First, every black wire in this circuit is a ground. So, they won't directly supply power.

Starting with the headlamps, the low beam power supply is provided by a yellow wire. So, when you have the low beam turned on, that wire should have power.

The high beam on both sides are powered by a green wire. Same thing here. When the high beam lights are on, those wires should have power.

Malinda, do you have a test light or anything to test for power? Also, the ground wires (black in color) will need to be checked for continuity to ground. If you have a test light, you could connect the alligator clip side to the battery positive and then probe the black wire with the lighted side. If there is continuity, the light will turn on.

Note that when you check for power (not ground), the test light will need to be connected to the battery-negative terminal.

Let me know if this helps. Also, let me know what you have available for testing. For example, do you have a test light or anything to test circuits?

Take care,

Joe