Neither the power windows nor the automatic seat belt is working. We replaced the Master Switch and checked the motor in the regulator (which appears to be fine) but windows still aren't working. The wires have juice as the window works when it comes directly from the wires - but we get nothing when we push the switch. We couldn't find the relay. If it exists, can you tell me where it is located. We've spent over $100 bucks but still have the same issues. The automatic seat belt also stopped working but the light indicator works and sounds like it always has - as if when opening and shutting, it's actually moving. Ideas and suggestions are greatly appreciated.
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Does you truck have Memory Seats ?
There are 2 options of power seat systems available in full size trucks. The first is 6 way driver and passenger power seats without memory. The second is an 8-way driver seat plus 4-way lumbar with memory, heat and optional cool function.
If you replaced the circuit breaker , did you check for B+ voltage at the switch ? If you have memory seats there is a control module that is in the mix.
For the power windows same thing here ,the BCM - body control module is involved .A factory Tech 2 scan tool is still the best tool to use ,checking data parameters .
The switch for the front passenger power window has 2 positions UP and DOWN, and it's position is a direct input into the PDS. Upon receiving a request for power window operation (switch activation), the PDS supplies voltage to the power window motor right front up or down circuit and grounds the opposite and the power window motor runs to drive the window UP or DOWN.
The front passenger power window can also be operated from the driver master control. The front passenger window switch on the driver master control has 2 positions UP and DOWN and it's position is a direct input into the DDS. Upon receiving a request for front passenger power window operation, the DDS transmits a GMLAN message indicating the changed switch position. When the PDS receives this message, the PDS supplies voltage to the power window motor right front up or down circuit and grounds the opposite and the power window motor runs to move the window UP or DOWN.
GMLAN - is a data bus communication network that vehicle modules talk together on.
Rear Passenger Power Window Operation (RPO A31/AN3/DL3)
The body control module (BCM) monitors the window UP/DOWN command from the DDS. When the rear window UP or DOWN command is received, the BCM sends a signal to the appropriate rear window switch. The rear window switches continuously monitor the up and down signal circuits, if no function is being commanded, the signal voltage is at approximately B+ voltage. If the UP or DOWN function is commanded, the BCM signal voltage drops approximately 5 volts and the appropriate rear window switch will then command the window in the UP or DOWN direction.
Your best bet would be to take your truck to a GM dealer !
Your best bet
Check your fuses and relays first. The radio fuse also controls the seat belt shoulder harnesses, dash clock, and lighter. Check all your fuses and replace any blown ones. There is a fuse panel in your engine bay and one on the driver's side under the dash near your door
Make sure the window lockout button is not depressed on the master window switch. This will turn off the other switches and not let them control there respective windows.
Power is supplied to all the windows from one fuse and one relay. So if the master switch operates the window than we know the fuses and relays are o.k. We know the master switch will operate the window so that tells us the window motor and ground side of the passenger window motor circuit are also good.
Which leaves us with a bad switch or no power to the switch. The passenger window switch gets its power to operate independently from the master switch window lockout button. When the button is off power is supplied to the passenger switch and allows the passenger to operate the window themselves.
The only thing you need to do is check for power at the passenger switch on the brown wire with orange stripe. If there is power there then you have a bad switch.
seats use heavy corrent & use relays instead of fuses. check relays in fuse panel. see chart on cover or owner manual for location.
Also, this is for 96 villager seats.
Power is supplied to the seat motors through the 30A POWER WINDOW fuse. The fuse is located in the LH engine compartment fuse junction panel and is hot at all times.
The circuit breaker is behind the interior fuse junction panel and prevents current overload and component damage.
first for the switch in window
the window switch is easy to test you just gotta remove switch out of the door leaving it hang there is a way to test with a guaged wire with fuse on it
take the main power wire and touch to the other connectors on the main switch if the window goes down or up the switch is the problem
im suggesting this way first with fuse cause its easier then testing the windows motor inside the door frame the switches should just pop out of the panel with out haveing to take panel off
now the seat belts there are 2 style that are common to chevy
one is inside the molding of the drivers panel you gotta pop off the panels easily and gently to get at the seat belt retractor this will be bolted to the metal under the molding
the other style is in the seat which you gotta unbolt the seat under the top half it will need to be unbolted at the bottom top half of seat
when you pull threw the top section of top half of seat remember to tie a string to the end so that when you pull threw top half the string will be there so you can connect too new belt and pull back threw with ease make the string long enough to hang
now the bottom half of seat what i call the "**** seat" you remove the molding at bottom around the belt retractor this will be bolted to floor bolt also pull belt threw molding once molding removed
disconnect any electric wires
now saftey issue involved with seat belt removal is for a reason i dont know of the dealer ship always discharges the belts and air bags once removed i guess because of static electricity becareful when you remove belt and replacing belts cause static elec. can set them off
once your seat belt is removed place in card board box and take to dealer after complition of installing new belt they will discharge your seat belt for you and then you can dispose of it properly