99 Volvo VNL power window troubleshooting

[@gearsnstuff7330]

Have you tried replacing the switch? if it's sending power to both terminals in both switch positions, wouldn't that mean that the switch is screwed up? also you said that it works when you give it power from a battery, that also makes me think it's the switch

[@scatpack01]

I tried different switches.

[@gearsnstuff7330]

@@scatpack01 Could it be wires that've had the insulation fail? it seems weird that the motor works normally with exterior power but not with the switch. Or could someone before you have run the wiring to the switch incorrectly?

[@scatpack01]

@@gearsnstuff7330 possibly.... it jad some jumper wires run to it. I'm gonna run some wires from an external source to the switch see if that works. Be nice to be able to open that window!

[@scatpack01]

@@gearsnstuff7330 I fixed it by running a different + & - to the switch. Still only works on pass door switch but at least I can open it!