Help Needed: New window motor and switch only goes one way

[plik]

Recently the window motor gave up the ghost.  I got the regulator out, and then had the good sense to test my new motor before putting the regulator back in.

Anyway, it only spun in one direction -- up.

I figured the switch was bad so I got a brand new switch and still only one direction -- up.

Passenger-side front window - 1984 Chevy Suburban

[LTZ C20]

The window motor spins in opposite directions depending on which way the switch is flipped because all it does is reverse the power ground feed, i.e. reverse polarity.

For example
Up = Left wire +POS, right wire -NEG

Down = Left wire -NEG, right wire +POS

The window motor electrical connector can only plugged in one way.

[plik]

Here is a video showing my troubles --

[youtube]https://www.youtube.com/watch?v=pDbztXhWG40[/youtube]

If installed, it would only roll the window up.

More info: I also can't make the motor move from the driver-side controls at all. :-(

[LTZ C20]

The drivers side routes power thru the passenger side switch. So it's possible for the drivers side to not work, be ok and the cause is a faulty passenger side switch. You could also not have any voltage coming from the drivers side, which isn't allowing the passenger side to use power as needed or the relay may not be working properly to divert power in the proper direction for the requested switch position.

[plik]

So ... is the problem in the wiring connector that the switch plugs into?

I could easily imagine those wires getting loose in there.

What's the best fix for this?

[LTZ C20]

You can buy new wiring harness pigtails. Waiting for another member to chime in here, you may need to do some voltage checks first.

[bd]

Assuming the left window functions, there is an open in the wiring between the driver and passenger side switches or the driver side switch is faulty.  If you unplug both switches and both window motors, you can use an ohmmeter to check continuity of the tan and dark blue/white wires from side-to-side.  If the wires of like color have continuity, the switch is faulty.  Otherwise, there is an open in the wire with no continuity.  Avoid connecting your meter to any pink wires since they attach to 12-volt ignition and serious meter damage can result.

[plik]

Assuming the left window functions, there is an open in the wiring between the driver and passenger side switches or the driver side switch is faulty.  If you unplug both switches and both window motors, you can use an ohmmeter to check continuity of the tan and dark blue/white wires from side-to-side.  If the wires of like color have continuity, the switch is faulty.  Otherwise, there is an open in the wire with no continuity.  Avoid connecting your meter to any pink wires since they attach to 12-volt ignition and serious meter damage can result.

Thank you. I have a multimeter I can test with.

[plik]

You can buy new wiring harness pigtails. Waiting for another member to chime in here, you may need to do some voltage checks first.

Where can I buy such a replacement?

[bd]

Delco PT-254 5-way for right door (GM 12101862)
Delco PT-546 6-way for left door (GM 12125634)

Both OEM connectors are available from www.rockauto.com, et al.

[LTZ C20]

Delco PT-254 5-way for right door (GM 12101862)
Delco PT-546 6-way for left door (GM 12125634)

Both OEM connectors are available from www.rockauto.com, et al.

Well I'm gonna put my foot in my mouth now.....

[plik]

Delco PT-254 5-way for right door (GM 12101862)
Delco PT-546 6-way for left door (GM 12125634)

Both OEM connectors are available from www.rockauto.com, et al.

This is awesome! Thank you so much!

Two questions:

- I have a suburban, so the driver-side control uses a 10-pin pigtail. I don't think I need to replace the driver side; my question is about the passenger side switch -- is the passenger-side switch the same if the driver side uses a 4-switch control instead of a 2-switch control? It looks the same, I just want to make sure.

- For your right-door recommendation, will the same switch work for the passenger-side rear?

Thank you again!

[AZ87V10]

Yes, it should be the same switch regardless as to whether it's on a truck, Blazer, or Suburban. The right side switch should be the same switch used on rear doors for Suburbans and crew cabs. The only switch that should be different would be the driver's side which should be a four door control, which is the same for crew cabs. I think bd just assumed you had a 2 door truck and not a 4 door Suburban.

[plik]

Yes, it should be the same switch regardless as to whether it's on a truck, Blazer, or Suburban. The right side switch should be the same switch used on rear doors for Suburbans and crew cabs. The only switch that should be different would be the driver's side which should be a four door control, which is the same for crew cabs. I think bd just assumed you had a 2 door truck and not a 4 door Suburban.

Thanks! :-)

I found it a $1 cheaper on Amazon than RockAuto (weird, I know), and with free shipping at Amazon I bought it there. So, it's on its way.

[AZ87V10]

Nice! Good luck on it and let us know how it turns out!