Electrical prob: passenger mirror, drivers window and cabin fan
I have several electrical problems cropping up on my 99 Chevy Venture. They are that the drivers window moves up and down in increments down will go about half then a little at a time after that. Up it moves in 1/4" increments. I have replaced the switch and motor and lubricated all joints.
The cabin fan turns on intermittently with no key and will only turn off if I turn the fan selector to 5/hi.
The passenger power mirror intermittently drifts to the outermost position.
The overhead digital mpg/temp/speed gauge goes on and off intermittently.
Very occaisionally the vehicle won't start at all even with jumper cables attatched then fine for months and months.
Is there any common electrical junction that could cause all or most of this? The window is the most bothersome thing. Thanks
There is a very good chance that you have a very poor earth (ground) connection. check all the the earth wires make sure that they are clean and tight even the ones under the dash you might have to look at a user manual to check where all of the earths are some are hidden away behind carpets and plastic trims all of these need checking remove them rub with abrasive cloth and refit making sure they are tight.
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Have you tried the drivers door "passenger door window switch" and the passenger "door window switch" to try and roll the passenger window up?When you do try to roll it up make sure the vehicle is running as you want the most voltage to the window motor.If both door switches would not roll the window up,try the following.
With the engine running hit the up window switch on the passenger door just as you give the door a HARD FIRM RAP.The window should roll up.It may take a few tries.DO NOT roll the window back down until you have changed or dissembled the window motor for a good cleaning.Also,check for broken wires at the door hinge area on both the drivers and passenger sides,pull each wire firmly looking for a broken wire.
All of the interior lamps are powered thru the body computer. The power source is a 10amp fuse marked CTSY LAMP. The vanity mirror is on the same circuit with the lights for the door lock and power window switches.
if you have fully charged battery and you are having this problem well i would take the door panel off and watch it operate make sure every thing is moving smoothly and lubed if you can switch the switches from passenger to drivers test both see if the drivers window operates normal same with other side if no change then yes find new motor on craigs list .com hope this helps you out
On the inside trim, you can remove screws that are by the door handle,
arm rest, under door and side of door and then gently pull back on the
panel as there will also be retaining clips attached and you don't want
to break them. You'll need to lift the door panel upwards in order to
get it off the window ledge. Once the panel is off, you will see two or three bolts securing the mirror assembly onto the door
If you can do it, run a jumper from the drivers door to the passenger door. Unplug both motors. try to run the passengers door off the drivers switch to rule out the motor. I don't think it is because the motor is dc. But this is the common point. Please mark this as helpful or fixya. Shuold you have anymore problems, I used to be a mobile mechanic electircian. Looking forward to hearing from you.
Your chevy uses two fuses for the system. The power lock actuators are on the 15 amp fuse inside the truck. The fuse for the switches (locks and mirrors) are under the hood. For 99 to 04 (I think those are the years) there is a TSB on replacing the 3 amp fuse under the hood with a 5 amp fuse because this is a well known problem of having these blow.
Your drivers side window is a different issue. If the rest are working your problem is in the motor or getting power to the motor. The wires that go from the body to the door often crack and break with the opening and closing of the door.