I need some advise. Over the weekend I started my truck and the ABS light and parking brake light came on. I drove to the end of the block with no problems and restarted the truck but the lights stayed on. After making a few stops all of a sudden I go to brake and the brake pedal goes all the way to the floor. I'm going to dive into the problem tonight but wanted to see if anyone had any thoughts....

 

Probably low on fluid, check for leaks.

-Jon

 

I know this sounds weird but I drove my truck for a year with the abs light on and couldn't figure it out, then I noticed a wire hanging from the rear end and took a look. Figured out where it had been and re connected it, my abs light quit comming on. Learned later that the vss on the rear end is also connected to the abs light and speedometer.
Yours sound low on fluid though

 

Thanks for input guys...

 

I had a 95 with the same problem turned out to be a short between on of the sensors. took the dealer a whole day to find it and fix it.

 

Check the rear wheel cylinders for leaks. If one of these is leaking it will cause a loss of fluid, which will trigger the lights.

 

My truck has that same problem, the slowly leaking wheel cylinder eventually causes the fluid to get low enough to cause the abs and brake lights to come on.