ABS computer soft grind??
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Joined: Dec 2005
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From: Waynesville, NC
ABS computer soft grind??
I have a 2000 f-150 lariat 4x4 ABS 5.4L. every time I turn the key foward just so the lights and stuff comes on not where it starts the truck, I can hear a soft grind or clicking I have pin pointed it to what I think is the abs computer it has 4 brake lines coming out of the back of it and a wiring harness out the front. This will do this no matter what I do when I turn the key forward to run position or as soon as I start it and the key goes to the run position it will do the soft grind it only last maybe 2-3 seconds then quits. Is this a bad computer please help me
Thanks
Thanks
Last edited by davidshick2; Jan 16, 2006 at 07:22 PM.
Senior Member
Joined: Oct 2002
Posts: 7,295
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From: St. Louis (Out in the woods)
Originally Posted by davidshick2
I have a 2000 f-150 lariat 4x4 ABS 5.4L. every time I turn the key foward just so the lights and stuff comes on not where it starts the truck, I can hear a soft grind or clicking I have pin pointed it to what I think is the abs computer it has 4 brake lines coming out of the back of it and a wiring harness out the front. This will do this no matter what I do when I turn the key forward to run position or as soon as I start it and the key goes to the run position it will do the soft grind it only last maybe 2-3 seconds then quits. Is this a bad computer please help me
Thanks
Thanks
That sound is the ABS system performing its power on self test (POST). It is actuating its valves and the pump as part of the test.
Completely normal.
Now, if the ABS light stays on, you've got a real problem.
Steve
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Joined: Jan 2000
Posts: 3,205
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From: Along Lake Erie
Originally Posted by projectSHO89
That sound is the ABS system performing its power on self test (POST). It is actuating its valves and the pump as part of the test.
Completely normal.
Now, if the ABS light stays on, you've got a real problem.
Steve
Completely normal.
Now, if the ABS light stays on, you've got a real problem.
Steve
Ditto. Mine does it too (although mine is a more abrupt thunk as the valves cycle). The dealer was stumped the first time too.... finally narrowed it down.... completely normal part of the self-test. Some of them are quiet, some of them are not. You and I got loud ones.
Nothing to worry about though.-Joe
