Garage door plug in wireless receiver color sample in white.
Garage door push button voltage.
The voltage to the sensors is usually transformed at the main opener to low voltage probably dc but maybe ac.
The universal remote button kits you speak of are not going to handle the higher voltage associated with the older model opener unless it is powered.
Ratings 179 270 8 0 garage door part accessory type.
Usually 12 volts dc so your 13 volt reading is likely correct.
A wall console unit for a garage door opener is not a complicated device so it s fairly simple to troubleshoot when something seems to go wrong.
Loosen the two terminal screws on the side of the opener where the bell wire attaches using a screwdriver.
Universal garage door opener interior wall push button.
All available were rated 16v max.
Locate the bell wire that connects the wall switch to the garage door opener.
Rail extension garage door openers.
Universal garage door opener led light bulb.
Although the bush button system operates on low voltage always un plug the garage door opener and lock the garage door before starting any repairs or work on with the garage door or the garage door opener.