BenzWorld Junior Member
Date registered: Dec 2014
Vehicle: 1972 280SEL 4.5
Location: Miami, FL
Mentioned: 0 Post(s)
Quoted: 3 Post(s)
w108 1972 280sel power window nightmare
Just started putting together my inteior on a long restoration.
Power window motors were taken out and lubbed two regulator changed.
All terminals cleaned and lubbed
Now to the issue.
My front driver and rear passanger windows work perfect, BUT my front passanger and rear drivers windows do not.
Checked power on the NOT working switches and they do have power and ground but instead of reversing polarity they change polarity all together to the motor either sending both positive or both negative, that goes to both doors that are not functional.
The relays were checked, fuses checked
No wiring was ever cut or looks to be cramped anywhere, probed both motors w reverse polarity they work perfect bypassing the system.
I am pretty savy at wiring but this is kicking my butt.
Any help welcome.
Thank you in advance