T12 2bulb fixture electrical issue

Tarheelfan

I have a room with six individual 2 bulb t12 fixtures controlled by the same switch, three in a row on one side work perfect, three on opposite side of room do not burn. I have replaced ballast on all non working fixtures, insured good bulbs. I have 125v ac come down on each fixture on main feed, on each fixture I have only 20 volts reaching each bulb socket. I can leave main hot and neutral hooked up insuring 120v present and test voltage at ballast wires without them being tied into fixture wires and still only get 20v there. This is same on each non working fixture.

k_buz

Voltage reading off the ballast are basically useless. Did all three fixtures go out at once? Did they stop working at different periods of time? Did you replace the lamps after replacing the ballasts? What ballasts did you install?

Pictures of your ballasts and your wiring would be of great help.

__________________

Tarheelfan

Ballast info below. These fixtures have been out since before my time so not sure how long but a long while. Yes I put new bulbs from box in each fixture after ballast install. I have two blue coming off fixture tied in to two blues off ballast, two reds tied to two reds two yellows tied to two yellows.
PRODUCT DESCRIPTION

The GE 120-Volt Electronic Ballast features an energy-efficient design and rapid-start, quiet operation. This ballast is designed for use with 3 ft. and 4 ft. T12 lamps and can be used as a replacement for the 2-lamp, 4 ft. T12 magnetic ballast.


Linear fluorescent design
Series wiring
Rapid-start, energy-efficient 2-lamp design
For use with 3 ft. and 4 ft. T12 lamps
Use as a replacement for the 2-lamp, 4 ft. T12 magnetic ballast

bobelectric

Bad wire "nut" connector.

Tarheelfan

When connections were made I twist spliced wires together before applying wire nuts so should still have connection even if I had no wire nut.