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What else can I check if only 1 headlight motor door works

Tiny
BILLMILL5050
  • MEMBER
  • 2002 PONTIAC FIREBIRD
  • 77,000 MILES
When I turn on headlight switch only 1 headlight door opens but both lights come on. I replaced the plastic gear in the motor 3 yrs ago. With the brass gear. I can mannually raise and lower door. Door fuses under hood good with circuit tester on drivers side light motor connection apart not on motor side connectio but on harness wiring on dr gr wire to gr/wh to motor 1 light lights. On L/gr wire to bl/gry wire to motor 3 lights light. On yellow wire to brown on motor side harness no volts with swith off poeer w/switch om. Lgr to LGR head light works bl to bl lights works I took motor apart the brushes were built into the gr/wh and the bl/gr harness for the motor connection were about 1/8 " long non changable. If im getting power at the motor harness shouldnt the shaft on the motor turn (motor not hooked up to door thank for any thing I can do or checck a guy that rebuilds motors for fieiro's said hes never heard of brushes going bad?
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Saturday, May 19th, 2012 AT 3:36 AM

21 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So when you turn the head lights on do you get power and ground to the inop head light door motor?
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-2
Saturday, May 19th, 2012 AT 6:00 AM
Tiny
BILLMILL5050
  • MEMBER
  • 66 POSTS
Yes up to the harness but with apart how do you chek harness on the motor side?
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Saturday, May 19th, 2012 AT 10:15 PM
Tiny
BILLMILL5050
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  • 66 POSTS
On the blak wire should I be getting 0 when off and.06 when on?
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Saturday, May 19th, 2012 AT 10:19 PM
Tiny
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  • 66 POSTS
Im getting power to both wires at motor on & off
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+1
Saturday, May 19th, 2012 AT 11:24 PM
Tiny
SATURNTECH9
  • MECHANIC
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Which motor is inop?I dont see a black wire to the motor in the wire diagram.
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Sunday, May 20th, 2012 AT 12:28 AM
Tiny
BILLMILL5050
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  • 66 POSTS
Driver side there is a black and gray and green and white seems like I shouldnt be getting power at the motor when switch is off but even so motor still doesnt run
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Sunday, May 20th, 2012 AT 6:40 AM
Tiny
SATURNTECH9
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What is the exact model firebird that you have?Iam only seeing two wires to the headlight motor in my wire diagram.
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Sunday, May 20th, 2012 AT 2:51 PM
Tiny
BILLMILL5050
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  • 66 POSTS
2002 6 cyl. 2 door their only 2 wires grn & wht and gry &blk
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Sunday, May 20th, 2012 AT 9:02 PM
Tiny
BILLMILL5050
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  • 66 POSTS
Where is the headlight control module?
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Sunday, May 20th, 2012 AT 9:08 PM
Tiny
SATURNTECH9
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It says the module is right front side of engine compartment.
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Sunday, May 20th, 2012 AT 9:25 PM
Tiny
SATURNTECH9
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There is what I have for the wire diagram I cant read yours when I blow it up.
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Sunday, May 20th, 2012 AT 9:31 PM
Tiny
BILLMILL5050
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Ok found it fas 2 plugs on left top to bottom yellow, red, brown, blue, black. On right plug top to bottom dr. Green, li, green, li, blue, dr blue how would you check it to see if bad because im getting power to motor with switch on and off. I judt found a blown fuse in fuse box in dash a 1 amp labeled stg whl cvtrl
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Monday, May 21st, 2012 AT 2:15 AM
Tiny
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Did you replace the fuse?Also I need to see/find a wire diagram that matchs your car.
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Monday, May 21st, 2012 AT 4:05 AM
Tiny
BILLMILL5050
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Not yet it is the sterring wheel controls
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Monday, May 21st, 2012 AT 4:31 AM
Tiny
SATURNTECH9
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When you turn the head lights on you should get a wire with battery voltage. Also a wire with a good ground.
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Monday, May 21st, 2012 AT 4:35 AM
Tiny
BILLMILL5050
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  • 66 POSTS
So of the 2 wires the (grn & wht) or the (gry & blk) one will + and one - right I talked 2 a man that rebuilds motors said brushes are to short. So instead of sending it to him & paying 50 to rebuild .I went to Oreilly's bought one for 77 with lifetime warranty so if gear strips they replace and I dont have to pay 55 for a brass gear. I havent installed yet its raining I hooked it up 2 my 18 volt drill battery and it ran with 1 wire to + and 1 to - ill hook up tommorrow maybe wont be something else thanks for the help. Ill probabbly re-post if it doesnt work. P.S. What does a headlight motor controller module do? And that 1 amp fuse to sterring wheel controls there are 2 infuse box but it isnt that one the controls work with out fuse goes to something else ill try not to bother u anymore I hope thanks again
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Monday, May 21st, 2012 AT 11:16 PM
Tiny
SATURNTECH9
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Turn the headlights on light green wire should get battery voltage at left head light motor harness. That is the power feed for the up signal for the left head light motor. The head light module is the brain for the head light motors it controls power turns the motors on and off controls there up and down movement etc.
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Tuesday, May 22nd, 2012 AT 1:42 AM
Tiny
BILLMILL5050
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After installing new motor same thing is there a way 2 checking module
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Wednesday, May 23rd, 2012 AT 9:39 AM
Tiny
SATURNTECH9
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So the wire diagram your posting matches your car?If so could you blow it up so I can read it and email it to me?Because I dont think the wire diagram I have matchs your car the one I posted does it?
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Wednesday, May 23rd, 2012 AT 5:14 PM
Tiny
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After all that I checked module power in & out I looked at harmess again it looked like the green wire was missing part of the inside so I cut a piece of wire and stuck in there came up fine then wasted 77 for motor but could have been worse thanks for your help I appreciate it
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Thursday, May 24th, 2012 AT 2:21 AM

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