2002 Ford Ranger brakes?

Get under the truck and look at the backside of each wheel to see if there's any wetness. Also, there's a brake line junction that is bolted to the top of the rear axle housing. Check to make sure the rubber portion of the brake lines are not chaffed or dry-rotted.

Most likely cause is a rusted brake line. you will have to get under car follow brake lines from font to back look for leak. If master was bone dry there is definitely a leak somewhere not likely to be master cylinder. Other possible places for a non obvious leak is the rear wheel cylinders crawl under rear and look at bottom of brake drum is it wet?? Good luck.

yea you place a heavy toll on your reas brakes dont wanna pay attention it so ill supply you this --- beforehand you bypass employing block off the wheel -tire so it wont roll on you once you do this !!! you're going too check out the foot brake lever on your e brake in case you check out it - from the sq. pad you stomp directly to set the p-brake persist with it up that leg ..... you will see a cable ending there and a spring be careful reason its not the stress on the spring thats deadly !!!! its the foot brake which will bang ya sturdy interior the top it has killed experienced mechanics --- you will detect a small --DETENT - LEVER -- which will launch toh p- brake this is there be careful while finding there so which you dont get cracked interior the top or worse take a eye as im telling you this im not in charge for any factor that occurs and dont slam the p-brake on so stressful

gotta find out where the fluid went before you start replacing parts/check between master cyl and power booster/really trace the brake lines and the wheel cylinders/have to find out where it went

Once air gets in the system, you must bleed all 4 corners.

Then, you have to find where the leak is.