Question about 1990 Ford F150

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Anti-lock & brake lights are staying on

I have a 1990 Ford F150. The anti-lock & brake lights are staying on. I have had the front & back brakes redone, brake fluid changed, master cylinder checked - but their are still on. Is there a reset?

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  • Mike Butler
    Mike Butler May 11, 2010

    Have you checked brake switch on pedal arm ? Should be power in but not out until pedal depressed. Could be 2 different problems.

  • yadayada
    yadayada May 11, 2010

    The light is on to tell u that a problem exists in the ABS, have the ford dealer test the system for the trouble code and then u will have some idea what ad where the part is is that is causing the problem. Remember right now your ABS system is disabled.



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Posted on Sep 28, 2009


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1998 ford F150 abs light stays on/master cylinder is full of fluid

Norman, The ABS light is telling you there is a fault in the Anti Lock Braking system, could be faulty wire/plug,sensor, leaking/stuck wheel cylinder/caliper, etc. The computer in your vehicle will have to be scanned to find the fault, diagnosed and estimate repair. Check the attached links,instruction and guides, Good luck
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It is something in your brake system and it will take some troublshooting to figure it out. Although it says rear anti-lock it could also be the master cylinder.

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Motor1258 is asking for clarification - 1990 Ford F-150

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