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RABS lock up - Temp fix

I have a 1990 F350 2wd Dually /460. I really enjoy driving it and plan to until gas gets too expensive. I'm running singles in the rear for winter. I'm using A/T tires all around. I drive somewhat slowly, and use the brakes lightly. The Anti-Lock light is on. What I've noticed on occasion, when applying the brakes on pavement with a light deposition of loose sand-like dirt, the rears lock up at the slightest touch. This is not a wintertime asset! The brakes don't fade with heavy pressure.

My questions are:
1. Can I bypass the ALU and expect normal pickup truck winter braking behavior? Are instructions available?
2. Are parts available?
3. I have a factory manual to diagnose the problem, but no explanation for the codes. Any help?
4. Not a question - My shop is full for the next month (or more) to get my two 4WDs back working.
 

Fellro

Moderator
Staff member
8,013
393
Iowa County, Iowa
Had 92 F350 dually that did the opposite, actually blocked the rears from activating. Yes, you can simply eliminate the control and the brakes will behave as a regular non-ABS type braking system.
 

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