Have a 70 Challenger with factory power windows. Wiring harness looks OK. Switches have been rebuilt and terminals cleaned. All harness connectors have been cleaned.

Problem: The passenger front window motor doesn't have enough power to fully raise the window. When hot-wired, the motor works just fine. Neither the drivers master switch nor the switch on the passenger door allows the window to raise fully. When checked, the voltage is 11.2 at the connector to the motor when the switch is pressed to the up or down position. It's the same from either switch. The other windows work fine, although all move slower heading to the up position. They do close fully. I don't think it is the window track adjustment as it works ok when hot-wired. I have taken apart the terminal that the window switch plugs into and cleaned the "loops" of the terminals. Also, I compressed the metal "loops" in the terminal so it would mate well to the switch.

Not sure where to go from here. It seems there are not enough amps when going through the wiring harness to raise the windows. Any suggestions?

How / where did you get the switches rebuilt?

The Relays as in the previous post work great!

quote: When checked, the voltage is 11.2 at the connector to the motor when the switch is pressed to the up or down position.


is this with the motor connected?????? if not- then check it with it connected and report.

if you check the voltage either way with the motor connected and it reads like 8-10 volts- there could be a problem with the motors wires where it goes from the doors to the frame- after yaers of opening/closing they can break inside the wcovering and will not allow all the current to flow to the motor.



john mac

OK, I have a 1966 Dodge Charger with slow factory power windows.

I have cleaned all of the old grease from the regulators with brake kleen and relubed them and it did no good.

I have read through this thread and the link posted of the other tread and I am completely confused.

Can someone give me the simplest, most cost effective fix for this, with readily available parts please?

btt

Dred,

There are hidden internal splices in the factory harness. Cleaning or replacing only the ends does not necessarily solve the problem. There can be heavy corrosion still hiding. There are some pictures at the bottom of my JS Restorations thread on page 2 at the bottom that shows before and after with those splices. Take a meter and check the impedance on the lines from the master switch socket to the ends for the passenger motors and see what you read.

https://board.moparts.org/ubbthreads/show...part=1&vc=1

Jim

Bump for my question two posts up