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| Gen 2 headlight module repair experts? (Page 1/1) |
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KurtAKX
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JUL 27, 10:39 PM
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I recently picked up this beater 87 blue coupe.
When I got it, both headlight motor gear pucks were F'd.
I put Rodney's Delrin pucks in headlight gears, and all was spiffy....for a week.
Now, the passenger headlight functions normally, but when the headlights are turned off, the driver's headlight has started closing tightly and refuses to come up unless I back off the manual knob a little bit first.... then it works "up" normally.
I assume that this is because whatever circuit in the headlight module is responsible for current detection has a problem.
Does somebody have a rough circuit diagram that shows me where I might be looking for the current detection part of the circuit- there must be a shunt resistor of some sort, right?[This message has been edited by KurtAKX (edited 07-27-2017).]
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theogre
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JUL 28, 12:05 AM
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the motor is still having problems.
Module is doing its job and killing power to it thinking the motor is jammed.
See my Cave, Gen 2 HL Motor
you fix it/them for the pins then the motor can jam for several reasons, break the gear or break the output shaft.
I and others stopped messing w/ motors and bought Cardone new motors. https://www.cardone.com/ to get PN's
------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave[This message has been edited by theogre (edited 07-28-2017).]
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KurtAKX
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JUL 28, 09:33 AM
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I'm wondering if I'm hitting current limiting in "UP" due to the module not being able to detect current when it runs the motor "DOWN", effectively binding up the motor.
I will check to see if module continues supplying power to motor in "DOWN" after the headlight motor stops turning.
I know the little balls at the end of the worm gear are still in place, and I didn't adjust motor/worm endplay at all when I put the Rodney pucks in.
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Shho13
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JUL 28, 04:24 PM
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I can vouch for the Cardone units. They work great! They are brand new, but I think they are made in China, so I can't say if they will last as long as our old factory units. ------------------
"Discord"
Red 1988 GT under restoration!
Let's Go Mets!
( ͡° ͜ʖ ͡°)
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KurtAKX
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JUL 28, 10:48 PM
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| quote | Originally posted by Shho13:
I can vouch for the Cardone units. They work great! They are brand new, but I think they are made in China, so I can't say if they will last as long as our old factory units.
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Part number? Price?
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Shho13
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JUL 29, 12:52 AM
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Chris Eddy
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JUL 31, 09:22 PM
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FWIW, I believe that I have the basics of the headlight controller figured out. When the mosfet transistor is on, the current through the mosfet causes a voltage drop. When the voltage rises to a certain point, the chip triggers off.
There are two mosfets and two relays.
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migs
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JAN 20, 12:19 PM
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I am having my own probems with this system as I have converted to use the gen 2 on my 1986. My issue is that nothing raises or lowers using the switch. I have changed out the motors for the cardone versions, used the wire diagrams found here and verified that the 5 prong plug that goes into the module is wired correctly and has the correct pins with 12v+ on or off depending on the switch position. However when I check the output on the 4 wire plug that goes from the module to the individual headlights each one of these is showing 12v+ ALL THE TIME!! thats not changing with the headlight switch position and the only movement i get out of this is by hand cranking the headlights up and then initially connecting the module 5 wire plug which then powers both motors in the down position until they are closed and then nothing else. I had initially been sold a firebird 4th gen module which i have now substituted for one which is listed as from a 1988 Reatta and was listed as should work on Fiero. Internally both seem to have no broken parts although they have different electronics and both have the same 12v+ output on the 4 prong connecter all the time. [This message has been edited by migs (edited 01-20-2018).]
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