Cruise control
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Then the master cylinder has been replaced with a newer version, 1994 and up. I had two 1993 F150 Lightnings, on both of them the BPS was on the hydraulic line near the RABS hydraulic module.
Is the Brake Pressure Switch on yours hooked up? If it is and the recall harness is not there...disconnect the BPS immediately.
Is the Brake Pressure Switch on yours hooked up? If it is and the recall harness is not there...disconnect the BPS immediately.
Senior User
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Then the master cylinder has been replaced with a newer version, 1994 and up. I had two 1993 F150 Lightnings, on both of them the BPS was on the hydraulic line near the RABS hydraulic module.
Is the Brake Pressure Switch on yours hooked up? If it is and the recall harness is not there...disconnect the BPS immediately.
Is the Brake Pressure Switch on yours hooked up? If it is and the recall harness is not there...disconnect the BPS immediately.
Not to hijack this post, but here is mine.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Looks like a later version replacement master cylinder, but it is not tapped for the Brake Pressure Switch like the 1994 and later versions are. As I stated before the BPS on your 1993 model year truck is located on the driver side frame rail near the RABS hydraulic module. The same type recall harness was placed there. If it is not there...disconnect the BPS switch until you can source the proper harness with a fuse and circuit modifications.
Senior User
Joined: Feb 2012
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Looks like a later version replacement master cylinder, but it is not tapped for the Brake Pressure Switch like the 1994 and later versions are. As I stated before the BPS on your 1993 model year truck is located on the driver side frame rail near the RABS hydraulic module. The same type recall harness was placed there. If it is not there...disconnect the BPS switch until you can source the proper harness with a fuse and circuit modifications.
8th Gear
Joined: Aug 2013
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From: North Florida
1993 was the first year for the electronic Speed Control system on these trucks. There should be two mechanisms in place to disengage the Speed Control, the Brake On/Off (BOO) switch (located on the brake pedal assembly) and the Brake Pressure Switch (BPS) located near the RABS hydraulic module on the driver side frame rail. Very odd if both failed. I hope the Speed Control recall has been performed on the OP's vehicle. If not, it's a fire waiting to happen.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Looks like a dealer add-on to me. They used all of the older style vacuum speed control pieces. If the truck came with speed control from the factory the buttons would be on the turn signal stalk, not a separate stub sticking out of the steering column as shown in the first photo. The vacuum reservoir would also be mounted behind the driver side headlight, just like my 1992 F350. I believe that reservoir would also be made of metal not the round plastic ball.
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Fleet Owner
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From: Kentucky
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