I am having some spongey/soft brake issues with my Truck Toyota Tacoma, last year I purchased the truck with 49k miles and no 30k maintainence or Brake service was done to it. I did the 30k maintainence and also replaced the front Brake pads with OEM Toyota and noticed a Softer/spongey brake feel, so I decided to bleed the brakes and flush out the old fluid at the same time hoping it would stiffen the peddle up, I used some BG DOT4 fluid that I had from a previous truck which I have found out yesterday was manufactured in 2011 by BG, I contacted BG asked about sealed/unopened shelf life for this particular fluid the answer was 5 years, so scanning some YOUTUBE vids ive found one that says you can test the condition of the brake fluid with a voltmeter and I also found a few threads about it online. They said put Neg. to Grd.(battery) put Pos. into brake resovoir and the voltage reading should not be over .30 Volts the fluid no good, I got .35 Volts on my truck, has anyone ever heard or done this? I thinking the BG fluid I used last year was past due its sealed shelf life and maybe became contaminated and the net result is water compressing in my brakes giving me a soft peddle. any thoughts appreciated