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1989~1994:
RABS (1-channel, 2-wheel, rear-only ABS) was standard factory equipment on all U.S. production Rangers.
1995~2000:
RABS continued to be standard.
4WABS (3-channel, 4-wheel ABS) became available as an option depending on other equipment.
2001~2009:
4WABS (3-channel, 4-wheel ABS) + EBFD (Electronic Brake Force Distribution) became standard factory equipment on all Rangers. RABS was discontinued and no longer available.
2010~2011:
4WABS (4-channel, 4-wheel ABS) + EBFD
The ABS also provides inputs to the traction control, ESC (Electronic Stability Control) and RSC (Roll Stability Control) systems.
heres a pic of the proportioning block as I could not find a pic of the abs control module. If you follow the harness back it will be plugged into the control module which, iirc, is located on a frame rail.
If your truck was built in the US, it has/or had ABS as none were delivered without it. However, over time, it may have been bypassed or eliminated.
You could also try a panic stop (try to lock the brakes) on a slippery surface. Obviously...be careful but a properly functioning ABS will transmit a pronounced pulsation to the brake pedal, you'll feel it.
There should be an ABS indicator light in dash cluster that lights briefly( providing it's not burned out) when you start the car which should help confirm things.
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