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ABS light on, pulled fuse power and light still on

mp3deviant721

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My ABS is on. I pulled the fuse for the power to the ABS module. Light stayed on. But got dimmer. Everytime I step on the brake pedal, the light gets brighter. Now I'm really confused. I also found out that someone put a 30 amp fuse where a 15 amp fuse at the #13 fuse spot in the I/P box is supposed to be. I know that will cause issues but where should I start looking?
 


robmedina

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mine is on as well. sucks cause my parking brake handle is broken, so sometimes I screw up and dont release the pbrakes 100% only to find out 10 miles away that I have been driving with the pbrake slightly on.
If my ABS/ Brake light would go out then I would know that the pbrake is on or not. WHY is the ABS on anyway? the truck performs as normal.
 

Earl43P

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Fuse 10 powers RABS Keep Alive Power among its other circuits (ext lamps, turn/stop/hazard), could explain the behavior. LG wire to the ABS Module

Fuse 15 is probably the one you pulled.
 

mp3deviant721

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I pulled the #14 fuse. I'm sure of it. It had a 15 amp fuse in it. It was supposed to have a 20 amp fuse. But like I said there was a 30 amp fuse that was in the #13 spot.
 

mp3deviant721

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Ok. I noticed that if I take out the ABS power fuse and apply the brake, and then reinstall the fuse, the light will stay off until I take the brake off. What malfunctioning component would be causing this?
 

mp3deviant721

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I was looking at a wiring diagram for the RABS system and had a brain spark. Could the light green wire coming off the brake on/off (BOO) switch be shorted with the tan/light green wire going to the brake fluid level switch? Because if that is grounded, it would certainly cause the RABS module to throw a low fluid level code. Or could having a bad brake fluid level switch be causing the light to turn on? God this is giving me a headache.
 

Ak907Girl

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Try taking apart your dash.

Did you buy your truck used? If you did someone might have messed with stuff under the dash (that always pisses me off.) The kid I bought my ranger from thought that the alternator was bad, but I had it tested before i bought it and it was fine (and I totally screwed this kid over... lol) The idiot kid didn't have any fuses in it. HA! I bought $1,000 truck for $495! but after a few hundred miles I had to change out the alternator.
 

mp3deviant721

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There isn't any "custom" wiring under the dash, other than the wiring for my fog lights. There is however "custom" wiring for a trailer harness that runs from the starter solenoid on the left fender to the left rear taillight. I wonder about the dumbass that did that job.
 

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