central
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Trooperbc I have a Helm's manual for my 99 Trooper. The first step in brake bleeding is to remove the ABS fuse, if so equipped. The second step is "Set the parking brake completely, then start the engine". It then repeats the exact same warning as your Chilton's namely "Notice: The vacuum booster will be damaged if the bleeding operation is performed with the engine off."

Not saying this applies to the 95 that started the posts. Just that it is a Helm procedure for some Troopers and that is what I have used with no damage.


central,thanks
so your 1999 trooper has 4-wheel AntiLock Brake System (ABS)?

central...
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Not saying this applies to the 95 that started the posts....


yeh, that's why in my first post i asked FEA...
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what kind of anti-lock brake system is on your's -- rear only or all four wheels. the helms book has more to say about the 4 wheel antilock system, which i'll give you if you need.


with or without his response, I should have read it further and gone on to say that in my 1992 trooper helms manual, the ABS system does follow those instructions and says, too,

helms manual ....
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When bleeding air without removing the main fuse, air cannot be let out thoroughly, and this may cause damage to the hydraulic unit, ,,,


I'd still like to know, if anyone out there can help, what/how damage occurs to vacuum diaphragm if engine is off on these ABS systems.

FEA, hope you're still there, and/or you're following the factory instructions (glad you got them).

1992 sohc trooper 3.2l v6 automatic . . . as is

i love a good intermittent electrical challenge. . .especially when it's someone else's.