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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

Dim lights, 2001 Suburban

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Old November 17th, 2015, 1:49 PM
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Default Dim lights, 2001 Suburban

Hit a deer and replaced the front end.

Drivers side headlights(low and high beams) and marker lights are half as bright as right side.

It is not the bulbs, changed them out.

Could it be some type of relay or kinked wires?

Thanks
Old November 17th, 2015, 4:33 PM
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Dim lights are indicative of bad ground. Make sure your new front clip is correctly grounded.


To test this you run a small wire from neg bat to the area near your lights
Old November 17th, 2015, 6:08 PM
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I did paint the area that two of the grounds attached to the frame. So there might be grounded wire in the wire harness for each side?

I hope it is this easy.

Thanks
Old November 18th, 2015, 9:27 AM
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Keep us updated,
Old November 23rd, 2015, 7:12 AM
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No solution yet. The main ground for the wire harness is attached to the cable coming from the battery. I separated the cables, expecting the light to go off and no change.

I need to search for a wire diagram and start sniffing.
Old November 29th, 2015, 9:13 AM
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Splice in a new ground wire from the battery to the back of the light bulb plug. Did that on my 2003 Burb and I have bright lights again. Ignore the original ground connections and presume them to be inadequate.
Old November 29th, 2015, 9:21 AM
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You grounded all the lights that way?
Old December 4th, 2015, 8:30 PM
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If I run a wire from the positive to positive, the lights get brighter. If do this with the ground, nothing.

So I'm assuming I have bad positive wire some where.
Old December 5th, 2015, 7:55 AM
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Check the headlamp relay & the connections to the backside of the relay socket. If you run a positive battery wire to the fuse sockets (RT HDLP, LT HTLP) and the lights get brighter, the wiring to the lights are probably OK.
Old December 7th, 2015, 7:16 AM
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Originally Posted by a55bruce
Check the headlamp relay & the connections to the backside of the relay socket. If you run a positive battery wire to the fuse sockets (RT HDLP, LT HTLP) and the lights get brighter, the wiring to the lights are probably OK.
It was a fuse burnt out. I just learned something, a burnt out fuse doesn't make the lights not work, just dull.

Thanks for the info.



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