Headlight door control module (Late C4)

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Dec 11, 2004 | 03:43 PM

GiDvEtTe84

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From: Maurice, LA

Headlight door control module (Late C4)

Well, my right headlight door isnt flipping. The motor and actuator are working fine. The problem is the control module, as i have the late model C4 2 wire upgrade. I have changed one of the transitors inside before, but now it seems some resistors are bad too. Due to the burn marks, i cant read the colors. Anyone happen to have a schematic for the part? I need to rebuild the circuitry so i can get it working again. Thanks.

Dec 12, 2004 | 05:02 PM

GiDvEtTe84

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From: Maurice, LA

Ttt

Dec 14, 2004 | 11:04 AM

GiDvEtTe84

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From: Maurice, LA

Dec 15, 2004 | 08:48 AM

GiDvEtTe84

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From: Maurice, LA

Ok guys, heres a pic of the board. From a close digicam pic, it seems that the resistor is 120K ohms? Notice the way i rigged up the burnt fuse. Its not burning anymore which tells me theres a fault somewhere else in the circuit. Tell me what you think. Thanks.

Dec 15, 2004 | 10:24 PM

kickbackking

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Quote:

Originally Posted by GiDvEtTe84

Dont care for the way you bypassed the fuse. The circuit board may have burnt open. Would suggest ohmic checks without power to determine if the short is outside the board. Mechanical problems (freezing up of the headlight motor or assembly) could cause excessive current blowing out your board. Unless the board drives a relay than this theory would not be valid. Would check for mechanical binding first and then static ohmic checks of the output of this board. Dont have a schematic of this circuit just a few ideas.

Later
Denis

Dec 16, 2004 | 01:29 AM

korvette4u

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From: CALGARY ab

Quote:

Originally Posted by GiDvEtTe84

is it the control module that you are repairing? like the one here?
http://www.madvet.com/shop?frame=1.835 if so i have a used one for sale,,,here....
http://forums.corvetteforum.com/showthread.php?t=969939 PM me if u want..

Dec 16, 2004 | 10:10 AM

GiDvEtTe84

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From: Maurice, LA

Thanks everyone. Yes it is the module Im trying to repair. It seems that the motors are working fine. I wanted to try to replace the components myself rather than buying another.

Is there any way to find the value of the fuse (F2)?

I will get my solder sucker out and start cleaning and order new components. Can you tell me if these will work?

Big one:

http://www.radioshack.com/product.as...Fid=276%2D2072

Which Little one?:

http://www.radioshack.com/product.as...Fid=276%2D1617

http://www.radioshack.com/product.as...Fid=276%2D1604

I cant tell if its an NPN or PNP.

Thanks!

Dec 16, 2004 | 03:57 PM

korvette4u

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From: CALGARY ab

Quote:

Originally Posted by GiDvEtTe84

do asearch for the part at : www.newark.com cross reference it to is name ...from ther u should be able determine polarity...the big one is:

InOne Part No.: 36C8690
Manufacturer: MCM
Manufacturer Part No.: BUZ10
Description: Transistor, Voltage: 50 V, Current: 20 A, Power: 80 W, Type: N-FET

the little one..are u sure that is a transitor?..no info on the marking 227...need more info on part #...can you still see the mask on the board?? if you can, the mark on it desinates polarity..

Last edited by korvette4u; Dec 17, 2004 at 12:42 AM.