power windows not working...help

[supercarrera82]

I just bought a 1979 porsche 911 sc targa and both windowa are not working, when i pulled the window switches out the drivers side passenger window switch had 3 wires disconnected and wrapped up in electrical tape, so i bought 2 new switches and reconnected the wires and it still did not work. Later i checked the fuse and the fuse was missing for the power windows, as i put in a fuse it instantly blew (which hurt like hell), so im pretty sure there is a short somewhere, what should i do? where should i start? if possible anyone know a shop around in hollywood, ca that could take care of this? Please let me know

[supercarrera82]

bump

[ChkbookMechanic]

If the fuse instantly blew it sounds like you have issues in your wiring.

Do you have the electrical diagrams for the window switches?

If so, I'd do a few things to try and figure out the problem
(1) make sure the wiring and fuses are correct
(2) make sure the wires are not damaged
(3) check and make sure you are getting proper voltage everywhere (e.g. fuse block, at the window switch, etc.)

[rick-l]

• Are you going to try to fix this yourself or take it to a shop?
• Are you electrically challenged?
  
• Do you have a meter?
• Are the panels off the door?

From the problem description there could be almost anything wrong. Time to start with the basics.

[sprintamx]

+100 on getting a wiring diagram and a testing meter. You will also want a huge helping of patience, and possibly aspirin. An immediately blown fuse does indicate a possible short. So, umm, good luck tracking that down.

But, as you investigate, do not overlook the relay your window wiring/power may be routed through.

I can not speak to a 79, but I recently went through a diagnose + fix for my 86. Neither the windows nor power seats worked. Long story short and several wiring diagrams later, I discovered that the seats and windows both go through the same relay. I replaced the relay--problem solved. On the 86, the windows and seats are always "hot" so I initially jumped the windows to the seats at the fuse panel, by-passing the relay, as a temp fix. But, if you are blowing fuses, I would not recommend that.

[dshepp806]

Gotta get the wiring diagrams,..period....esp. the switch connections (you may have them?)

Make use of your ohmmeter to check any wires that should be isolated from ground potential.........(vs. a short to ground)...

Best,

Doyle