Weird Brakes

[rayjaymor]

Hey Guys,

Before I race it to the mechanic in a blind panic, I thought I'd get some alternative opinions on something...

About 6 weeks ago I noticed I had spongey brakes. Quickly checked the reservoir, it was a little low. Thinking 'great, must have a leak somewhere' I topped it up.

Have watched it like a hawk since: not only has the fluid not dropped/lowered at all, I can't find any evidence of a leak anywhere either.
The brakes have also worked perfectly -- I even pulled a trailer during the time without issue.

I scratched it off as maybe the guys didn't bleed/fill the system properly when they replaced all four pads about 12-18 months ago.

Now, cut to this morning: My battery just completely shot itself on the highway to work this morning. Spent ages trying to get it started, bit the bullet and got a new battery.

The brakes are soft again however... I've checked the reservoir and it's still full this time...

Is there *anything* in the system that could cause an air leak from sudden loss of electrical power or something?

I haven't had a chance to re-check for leaks yet, but given the level hasn't lowered at all in 6 weeks (and it's been used HEAVILY in that time) I doubt highly that it's a huge leak --- but I have to assume there is air in the system somewhere...