I had an engine fire. Now I have no brake pressure. - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 01-21-2015
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I had an engine fire. Now I have no brake pressure.

Some wires came loose, melted and burned up by the master cylinder, burning some of the steel brake lines coming off of it. They didn't burn through but are nicely blackened. No fluid anywhere and it appears full.

Everything else drives normal, no lights on, just no pressure. The problem wires have been removed, they were for the stereo only. I know at this point I need to check all my fuses to see what's blown if anything. I haven't been able to check yet but that's my preferred solution. Can a fuse even cause a near total loss of pressure?

If it's not a fuse, what do I need to do next? From my research I could either have a bad master cylinder or abs module. What is most likely and how can I check it? Keep in mind everything worked fine before the fire. No damage visually other than the removed wiring and the blackened steel brake lines.
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Old 01-22-2015
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There are rubber parts, seals, inside master cylinder, how hot did it get?
Also melt-able parts inside power booster, but that wouldn't give no pressure just no assist/boost.

Fire, within reason wouldn't hurt metal lines, but flexible lines at the wheels could be damaged, you would see fluid leaking however.
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Old 01-22-2015
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Pretty hot I guess, the metal lines were glowing a little. No rubber lines near it, it was right up at the top near the master cylinder but the Mc itself didn't show any signs of outer damage. The only wiring casing that melted was in direct contact with the fire or hot metal. I don't know if it would have been hit enough to melt inside the cylinder but I may replace it anyway.
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Old 01-22-2015
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Well the brake fluid would have boiled so there will be air in the system, and that hot brake fluid would travel up, towards the Master, so yes I would say it got hot enough in there
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