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low voltage triggers abs and parking brake light? #5264440 11/11/19 06:03 PM
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motor_oil_madman Offline OP
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So whenever the batteries are going bad in my truck, the abs and parking brake lights do a second bulb check during a cold start. That is after waiting for the grid heater (glow plugs) to warm up it does this. Keep in mind I've owned this truck since new, and it's done this everytime I need new batteries. Now if the truck is warm enough to not need the grid heater, then the lights only do one initial bulb check. So what does that brief period of low voltage from starting up cause the two lights to come on and go out again?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: low voltage triggers abs and parking brake light? [Re: motor_oil_madman] #5264441 11/11/19 06:04 PM
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motor_oil_madman Offline OP
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The alternator is good reading at 14v when idling. btw it's probably one battery going bad, causing the other one to overstrain and make up for it.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: low voltage triggers abs and parking brake light? [Re: motor_oil_madman] #5264570 11/11/19 08:52 PM
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motor_oil_madman Offline OP
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Anyone know what this happens?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: low voltage triggers abs and parking brake light? [Re: motor_oil_madman] #5264591 11/11/19 09:16 PM
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tiger862 Offline
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Maybe voltage is detected low causing a blurb in self check. At least it isn't setting a code for low voltage in abs. The grids to draw lots of amps.

Last edited by tiger862; 11/11/19 09:17 PM.

Tiger862
2018 Grand Caravan
Re: low voltage triggers abs and parking brake light? [Re: motor_oil_madman] #5277539 11/26/19 12:01 AM
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joel95ex Offline
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abs motor probably not getting power it needs during the self test. i believe my accord did that when alternator was dying.


95 Accord 4cyl Vtec. 500,000+miles. RIP 😢
13 sonata killed by a deer @ 156k miles
07 civic SI 179k miles PP, M1 10w-30 fram ultra
18 santa fe 55k PP 5w-30 oem filter
Re: low voltage triggers abs and parking brake light? [Re: motor_oil_madman] #5277702 11/26/19 08:02 AM
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cwilliamsws6 Offline
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When my car's alternator was dying the ABS, VSA and parking brake lights would all come on randomly or sometimes all at the same time. 07 CRV


2007 Honda CR-V LX "The Linoleum Falcon" 210K miles
HK conv 5w20, STP blue bottle, PrimeGuard POF4610 filter.
"Bad decisions make good stories."
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