Question about 1987 Chevrolet S-10 Pickup

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Ctsy/dome lites remain on dimly when door is closed

When door is open lwr ctsy lites for each cockpit station lite just fine but dome and rear hatch lite remain off. when door is closed lwr cockpit ctsy lites dim and dome and rear hatch lites come on dim. when h/l inst panel rheostat is turned to ctsy lite ''on'' position only lwr cockpit lites lite (full briteness). pertinent info : developed problem after washing s-10. alarm system installed professionally 2 days prior. lh door pin switch was cleaned as corrosion kept it from functioning correctly and has 2 wires connected..rh door pin sw functions ok (but has only 1 wire attached though there are 2 spots for wires.....

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  • 47 Answers

Try removing one bulb or the other at one time preventing power completing the circuit if the problem in a light. Those ones are tuff to find but second place I would start is removing front door cils and cleaning out and playing with wires in there to see if you can find a problem, also wires in the boot between door and frame, usually drivers side cause it's used more often.

Posted on Apr 12, 2017

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6ya6ya
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Posted on Jan 02, 2017

motor1258
  • 6674 Answers

SOURCE: 2003 denali trailer wiring

If your signals & brakes are on 2 different circuits, ( for example a red lens for stop & an Amber for turn.) then you'll need to buy a converter that goes between vehicle & trailer. They're not too expensive at any trailer or RV place. I think some of the autoparts stores stock them now too.

Posted on Nov 29, 2008

  • 69 Answers

SOURCE: Center brake light illuminates, but LH/RH brake lights do not

LH/RH lights cable could be disconnected anywhere, will take a long time to trace.
Center Brake Light and LH & RH should be connected at one point.
Jump a cable from Center Brake Light to one of Rear Break Light.
Hope this will works.

Posted on Sep 12, 2009

  • 236 Answers

SOURCE: 2006 rear hatch does not lock from door lock

rear hatch solenoid

Posted on Dec 16, 2009

  • 1 Answer

SOURCE: rear hatch 2005 chevy tahoe is locked & won't open

my 06 tahoe just got this problem...all other doors lock and unlock with the fab and door switch...but the hatch is in permanent locked mode. i cant even unlock the hatch window. why is this happening?

Posted on Mar 09, 2010

  • 117 Answers

SOURCE: I have a 2001 cavalier with a dim driver side

Give this a try------get a piece of wire and strip both ends, the black wire coming out of the plug on the head light, stick one end of the wire in there and the other end to a good ground or the negative battery terminal with the lights on, if the light gets brighter, there is a bad ground to that light. I hope this helps, cause you have just done about everything else.

Posted on May 15, 2010

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2009g6 dome light comes on all by its self why


The dome lamp switch has 3 positions: DOOR, OFF, and ON. When in the DOOR position, the dome lamp operation is controlled by the body control module (BCM).The ON position provides a ground for continuous operation. Ground is provided at G302. The OFF position turns OFF any dome lamp operation. The courtesy lamps, may be manually turned ON by placing the instrument panel (I/P) dimmer switch in the DOME position. When the dome lamp switch is in the DOOR position, the dome lamp will illuminate when a door is opened. When a door is opened, the courtesy lamps turn ON. After all the doors have been closed, the courtesy lamps will remain illuminated approximately 10 seconds after the last door closes. When the driver places the dome lamp switch in the OFF position, the dome lamp will be disabled.

Do you hear any chimes when the light comes on ? Door ajar switch problem , maybe . Picture of car with door open light lit on the instrument cluster ? When does it come on , when driving or sitting still or both ?

You mite want to take it to a qualified repair shop and have it checked for DTC'S - diagnostic trouble codes .
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The body control module (BCM) applies battery voltage to the courtesy lamps through the courtesy lamps high control circuit. When any door is opened, the door ajar switch contacts close and the BCM receives a door-open input. If the BCM receives a door lock or unlock input or a rear hatch open input, the BCM will activate the courtesy lamp high control circuit, providing battery voltage to all of the dome lamps, reading lamps, rear compartment lamp, and vanity mirror lamps. In the event that any of these lamps were to remain illuminated for more than 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the courtesy lamp high control circuit to prevent a total battery discharge condition.

Do you know how to do basic automotive electrical testing ? How to test inputs and outputs of a control module ? in this case the BCM - body control module ? Find wiring diagrams at
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The interior lamps consists of two groups, lamps that can not be dimmed and lamps that can be dimmed. This first group consists of lamps that may not be dimmed. This Includes those lamps that may be manually turned on by placing the interior lamp switch to the DOME position, or by opening a door or a compartment:
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When the headlamp switch is placed in the DOME position, the BCM receives a ground signal. The BCM then applies a ground to the theater dimming ground control circuit. This illuminates the dome and roof rail lamps.
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The door ajar switch is part of the lock actuator inside the door !

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