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#507712 - 05/06/08 12:48 AM
Reatta Headlight Motor Repair
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Steve Mucci
Member
Registered: 05/01/08
Posts: 14
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I've completed the repair of my headlamp lift motor by replacing the three disintegrated plastic rollers within the large gear. I've tested it electrically on the workbench and everything seems OK; output shaft spins with a lot of torque.
My question is that I'm not sure what purpose the rollers serve. I thought they would realease and allow freewheeling when the headlamp reached the limit of travel. That does not seem to be the case as they appear to lock the gear to the shaft.
What am I misconstruing?
Thanks - Steve
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#507716 - 05/06/08 02:00 AM
Re: Reatta Headlight Motor Repair
[Re: Steve Mucci]
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Steve Mucci
Member
Registered: 05/01/08
Posts: 14
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Ok, no need to reply, the mechanism was more advanced than I thought. The online service manual describes the electrical operation of the lift motor.
The motor is powered by rapid electrical pulses. Between pulses the spinning motor acts as a generator and produces a voltage.
If the motor is stopped by the mechanical limits or by jamming:
- No voltage is produced
- No voltage is sensed causing
- Drive pulses to cease, motor stops
Steve
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