1995 tarus. Should I replace the bad hose and the two front hoses also? When parking brake released light remains on, rear brake drags. This was caused by the collapse of dual layer brake hose inner layer. Brake fuid could not return to reservior. Miss dignosed for 6 months. Caliper replaced, brake pads replaced, master cylinder replaced. Finally took to another shop. Diagnosed problem and replaced hose. 2 months later I believe the other rear hose has gone bad. Should I replace the bad hose and the two front hoses also? Is this a problem that often it occurs.

If one side went bad you have a good chance the other side is bad.
Jack it up and have a look at it.
Find whick wheel is draging.
To check for a bad brake hose when the wheel is draging just crack open the bleeder and if that relieves the drag replace the brake hose.
MT

Welcome on your first post on AF.
In reply to your priviate e mail.
I will reply here.
It is better to keep most questions and answers in your post.
That way every one can see the questions and help answer them.
As to your question about replacing them all.
It is hard to say. But I would have a look at the front and look at the outside and check for cracks or signs of getting bad.
You can not see inside but a lot of times they start to crack on the outside. If so replace them for sure.
That many miles and no service records on if they have been replaced use you own judgement.
But one thing I would do for sure is to flush out the old brake fluid.
Old dirty fluid is hard on all brake rubber parts.
A good brake fluid flush every 3-5 years can save you a lot of brake problems.
Good Luck MT

1995 tarus. Should I replace the bad hose and the two front hoses also? When parking brake released light remains on, rear brake drags. This was caused by the collapse of dual layer brake hose inner layer. Brake fuid could not return to reservior. Miss dignosed for 6 months. Caliper replaced, brake pads replaced, master cylinder replaced. Finally took to another shop. Diagnosed problem and replaced hose. 2 months later I believe the other rear hose has gone bad. Should I replace the bad hose and the two front hoses also? Is this a problem that often it occurs.

The parking brake is cable-actuated, not hydraulic. If your brake hoses are collapsed, that will not cause the parking brake to drag. Your parking brake cable probably has rust in the housing which causes the rear brakes to drag and the parking brake pedal to not return fully, therefore keeping the light on.

However, it is never a bad idea to replace old brake hoses. When you do, flush the entire brake system and put in new fluid from a new bottle, not a partially used bottle that's been sitting on a shelf for 6 months. Keep in mind that you will also want to cycle the ABS pump to get the old fluid out of the pump and new fluid in it. The machined surfaces and valves in the ABS pump can easily corrode if moisture-saturated brake fluid sits in the pump since it only circulates when the ABS is activated.

-Rod

Yes, I would replace the hoses. You can not tell if the other hoses are going bad without cutting them open. Assuming the hoses are all the same age and have been working under the same conditions, I believe another internal hose failure is imminent.