ABS Light
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Mountain Pass
Joined: Oct 2025
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ABS Light
1996 F250 4x4 5.8L replaced dash light bulbs and now ABS light stays on. I'm sure this has been beat to death and I've found the code chart. What are a few of the most common causes to start with. I've had this truck for probably 10 yrs and was always surprised the the A S light wasn't on. No telling how long the bulb was burned out.
Fleet Owner
Joined: Oct 2005
Posts: 20,783
Likes: 1,751
From: Kentucky
Start with checking the RABS Codes
Let the RABS controller tell you what it thinks is wrong before jumping to any conclusions.
Let the RABS controller tell you what it thinks is wrong before jumping to any conclusions.
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Mountain Pass
Joined: Oct 2025
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if you mean the ABS indicator light yes I replaced it with an LED bulb. I replaced all the dash lights with LEDs. Does this cause problems? I found the wire to ground and count the flashes but didn't mess with it tonight. Several bulbs were burned out or not working when I replaced them.
Logistics Pro
Joined: Nov 2013
Posts: 3,922
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From: Mojave, Ca
Yes, LED bulbs will always stay illuminated when used in the ABS indicator. The ABS trickles a very small amount of current through the bulb circuit. This is normal not a a problem with incandescent bulb because they require a few watts to illuminate. But the LED is more efficient and will illuminate with just the trickle current. Change that be back to an incandescent and it'll probably solve your problems.
Hotshot
Joined: Jun 2015
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if you mean the ABS indicator light yes I replaced it with an LED bulb. I replaced all the dash lights with LEDs. Does this cause problems? I found the wire to ground and count the flashes but didn't mess with it tonight. Several bulbs were burned out or not working when I replaced them.
I don’t understand the trend of changing interior or exterior bulbs to LED. I could not tell you the last time I have had to change any of the old incandescent bulbs because it burnt out.
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Mountain Pass
Joined: Oct 2025
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Yea I wasn't going to do the LED deal but was constantly having trouble with the incandescents on the flatbed so changed them to LEDs. Once I did that and they looked so much better I went down the old rabbit hole. I've tried to pay attention to any issues and have been doing one lighting system at a time so a bunch of things don't pop up at once. The only issue so far has been the ABS light, but some of the cluster lights were burned out so I was unsure. I'm going to check things out again tonight. One of my big concerns was fast blinking blinkers but they work fine and that might be because I went with a good quality incandescent on the front blinkers. I read an article earlier about soldering a 180 ohm 2watt resistor into the trailer light connector to fix the brake light issues with LEDs so may do that. I hate to pull the cluster to change the LED ABS light but will do that as well.
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Mountain Pass
Joined: Oct 2025
Posts: 112
Likes: 15
Yes, LED bulbs will always stay illuminated when used in the ABS indicator. The ABS trickles a very small amount of current through the bulb circuit. This is normal not a a problem with incandescent bulb because they require a few watts to illuminate. But the LED is more efficient and will illuminate with just the trickle current. Change that be back to an incandescent and it'll probably solve your problems.
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