headlights are up and do not go down
Thread Starter
Intermediate
Joined: Dec 2014
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headlights are up and do not go down
lights come on and cut off but doors never go down on eather side. I am getting 13.5 v to both wires at the motor at the same time.it is a 2000 c5 thanks for any help
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Are the motors running but the doors are not moving?
Getting voltage into and out of the motor tells me it should be running/turning unless it was bound. I don't think both motors would be bound.
Getting voltage into and out of the motor tells me it should be running/turning unless it was bound. I don't think both motors would be bound.
Thread Starter
Intermediate
Joined: Dec 2014
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both motors are getting power on both wires like head light module is tell them to go up and down at the same time is module bad or could it be a bad ground thanks for your reply
Race Director
Joined: Mar 2008
Posts: 12,413
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From: Rio Rancho NM
you dont have hids in them do you? try flashing your brights by pushing the stalk forward to click then backward to spring and see if that does anything. Fuses are good and both headlight modules are plugged in tight?
Le Mans Master
Joined: Mar 2011
Posts: 6,835
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From: Columbia SC
Unplug one motor and do your voltage test again. I want to verify if the module is really providing 12V on both wires, If it is that is your issue.
If not, the module may not be grounding the motors via G102.
If not, the module may not be grounding the motors via G102.
Instructor
Joined: Jun 2015
Posts: 140
Likes: 59
From: Neenah WI
2016 C6 of the Year Finalist
Mine were down once and wouldn't come up. I manually cranked them up, then turned them on and off and they have worked fine ever since. Not a technical solution, but it's free and quick to try!
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From: South Western Ontario
Le Mans Master
Joined: Mar 2011
Posts: 6,835
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From: Columbia SC
Why would you not expect there to be power on both wires? The motor is just a long wire. I assume you did not disconnect the motor and measure the voltage on each as I asked?
However , with that said, I think the module is the problem. It should not be providing any power when the HL switch is OFF. In addition, even if it was providing proper power as designed it apparently is not providing a ground for the motors to run. I don't think G102 is the issue nor is the MF switch in my opinion.
However , with that said, I think the module is the problem. It should not be providing any power when the HL switch is OFF. In addition, even if it was providing proper power as designed it apparently is not providing a ground for the motors to run. I don't think G102 is the issue nor is the MF switch in my opinion.
Thread Starter
Intermediate
Joined: Dec 2014
Posts: 39
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Why would you not expect there to be power on both wires? The motor is just a long wire. I assume you did not disconnect the motor and measure the voltage on each as I asked?
However , with that said, I think the module is the problem. It should not be providing any power when the HL switch is OFF. In addition, even if it was providing proper power as designed it apparently is not providing a ground for the motors to run. I don't think G102 is the issue nor is the MF switch in my opinion.
However , with that said, I think the module is the problem. It should not be providing any power when the HL switch is OFF. In addition, even if it was providing proper power as designed it apparently is not providing a ground for the motors to run. I don't think G102 is the issue nor is the MF switch in my opinion.
Race Director
Joined: Apr 2007
Posts: 11,152
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From: South Western Ontario
I'd quit worrying about the motor wire voltage without the motors running. The module could easily be applying 12V to both motor wires until it commands the motors to move when it applies ground to one side. Has anyone in this thread actually measured the motor wire voltages on a known good module with the motor disconnected??
Did you check the other dark green wire? It comes from the MFS.
Did you check the other dark green wire? It comes from the MFS.
Thread Starter
Intermediate
Joined: Dec 2014
Posts: 39
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I'd quit worrying about the motor wire voltage without the motors running. The module could easily be applying 12V to both motor wires until it commands the motors to move when it applies ground to one side. Has anyone in this thread actually measured the motor wire voltages on a known good module with the motor disconnected??
Did you check the other dark green wire? It comes from the MFS.
Did you check the other dark green wire? It comes from the MFS.
Intermediate
Joined: Aug 2006
Posts: 46
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From: Ringwood, England
headlights are up and do not go down
When you say you are getting a ground what test did you do? There is no mention I have seen on taking a voltage reading on the -ve part of the circuit. You need to see 0v
Thread Starter
Intermediate
Joined: Dec 2014
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I was talking about the black ground on the plug coming to the headlight and if I understand now is module sends +v to one wire and ground to other to open and reverse to close. do I understand that right? if so I may not be getting a ground to the module so I think it was said the dark gr wire to the module with the 5 pins is the ground? comes from g102
Thread Starter
Intermediate
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I checked the dk green wire and did not have power to the module at all on or off so i ran a 12v pos to the dk green wire and lights work fine so where does the wire get the power from,the multi switch?