My Liftmaster 312hm stopped opening my gate. I have an Elite Robo Swing R900 and I can't get a remote to open the gate. It appears the learn button works. When I press the remote, the yellow light turns on, but softly. If I short together the relay leads, the gate opens. When I measure DC voltage from red (1) to black (2) I get 8 volts, which I find strange. Red to ground measures about 4 volts. Any help is much appreciated!

SOURCE: Soft roof does not open

Find the two plastic caps sitting behind the sun visor on either side of the car. Gently prise them out, be careful as years of sun may have made them brittle. Behind the caps you should see a hexagonal head that the manual roof tool fits into (failing that use an allen key). Turning these hex heads will unlock the front soft top locks. (can't recall if it was clockwise or anti-clockwise, so be careful!). I found that you need to start one side, then unlock the other side, then come back to the first side and finish the job off. At this stage you should be able to lift the top up slightly to see it's no longer engaged in the front locks. Now move to the boot.

In the back of the boot you should see two small pieces of the trim that will lift out. These will be located on each side near the boot hinge mechanisms. Lift the trim peices out and you should see a lever (mine is made from cad plated something or other, ie it's a gold colour) and it will have red paint on it.

Fit the spanner/wrench end of the manual roof tool, or otherwise a 10mm open ended spanner, onto the small nut welded into the end of that red lever. I started on the left side(passenger side), levering gently down will unlock, and gently up will lock). You may need to alternate between each side, undoing a little and then swapping. NOTE: I found the levers won't budge unless the soft or hard top 'pins' are physically sitting in the lock holes. Don't force the levers as they should move quite easily.

Now that you have both the front and back locks undone, the last part is to unlock the tonneau or rear deck (soft top roof compartment). To do this you need the 10mm spanner/wrench again. You will find two hex heads tucked down in between the roll bar and the side of the interior trim (about 6-8 inches from the door frames), fit the spanner onto the head and turn until the tonneau cover releases. You should now be able to fold the soft top down by first raising the rear section of the soft top until the back lip is pointing to the sky, then lift the front section along with the rear section down into the compartment. I guess getting it back out is a reverse of the procedure above. Hoepfully I've got it all right as I've done it from memory.

SOURCE: o2 sensor wiring diagram

A new 02 sensor will come with new wires and connector. If not get back with me I think there is a repair kit for that problem.

SOURCE: 2001 Volvo s80 T6, the tail lights are not

it is a relay marked M15 in REM (rear electornic module). open the side panel in the trunk on the left hand side of the car. there is a rectangular panel (@ 7" x 9") full of fuses and cubes and card modules. in the middle vertically, and toward the front of the car (your right, looking at it) of this panel are the relays, 4 rectangular cubes 7/8"l x 1/2w"x 1" deep. sockets are marked M17 M16 M15 M14, but you can only see the M17(top) on my car because the socket is empty (the other relays cover their respective marking). M16 is the relay for the rear fog lamps. pull this one out (these are in tight so you have to rock it back and forth or gently pry),
pull the one below M15 and replace it with the one you took from M16. your fog lights won't work, but your brake lights will. I'm told the relay is about $20, I haven't bought one yet though cause this fix worked. i read this on another site. it was from a certified volvo mechanic.

SOURCE: unable to program my new 2009 Altima Hybrid Homelink to my gate

The Learn Button is in a Silver little metal box that is in the opener housing but separate from the opener itself, pry off the case which kinda wraps around the reciever, it will say liftmaster of chamberlain the learn button will be in the reciever

SOURCE: Wiring for Bosch Hologen Fog Lights? Wiring

Look on the relay for the terminal numbers.
Terminal 30 goes to the battery positive.Red Wire
The two terminal 87 go to the fog lights.Black Wires
Match the color wire with what you have on the relay connection for the rest of the wires.
Terminal 86 should connect to your low beam headlight.
Terminal 85 should go to the fog light switch.
The fog light switch should connect to the terminal 85 and the other terminal on the switch will connect to ground.